CN210344346U

CN210344346U - Knife gate valve with heat preservation function

Info

Publication number: CN210344346U
Application number: CN201920986722.7U
Authority: CN
Inventors: 侯超
Original assignee: Yongjiakaite Valve Co Ltd
Current assignee: Yongjia County Kaite Fluid Equipment Co.,Ltd.
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-17
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a knife gate valve with heat preservation function, including valve body, valve pocket, runner, support, valve rod and flashboard, the heat preservation device is installed to one side of valve body, and the heat preservation device includes casing, medium import, medium export, first heat preservation route, push rod and compression spring, and the second heat preservation route has been seted up to the valve body. A stroke groove is arranged in the shell, the push rod is positioned in the stroke groove, and the push rod can be abutted against the sealing surface through sliding; the shell is internally provided with a force application part, the force application part is positioned on the other side of the push rod opposite to each sealing surface, and the other side of the push rod opposite to each sealing element is also provided with the compression spring; the medium inlet and the medium outlet are connected with pipelines extending outwards, the two pipelines are provided with control valves, and the two control valves are provided with execution handles for operating hands. The utility model has the advantages of it is following and effect: the heat medium is injected through the heat preservation device, so that the temperature in the valve cavity is raised, and the gate plate can normally move in a cold environment.

Description

Knife gate valve with heat preservation function

Technical Field

The utility model relates to the technical field of valves, in particular to knife gate valve with heat preservation function.

Background

The knife gate valve is also called knife gate valve, slurry valve and slurry valve, its opening and closing member is a flashboard, the movement direction of flashboard is perpendicular to fluid direction, and the medium is cut off by means of knife-edge flashboard capable of cutting fibre material.

When the traditional knife gate valve works in a low-temperature environment for a long time, the medium remained on the gate plate is easy to freeze or crystallize, so that the knife gate valve is difficult to open and close. In the case of the situation, a common method is to wrap the valve body by using a heat insulation material, so as to reduce the loss of heat energy and keep the normal temperature of the valve body, but the method has general heat insulation capability and unobvious effect, and the heat insulation material is required to wrap the valve body layer by layer, so that the operation is complicated.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a knife gate valve with heat preservation function pours into the hot medium into through heat preservation device to the temperature of poppet valve intracavity lets the flashboard can normally move under cold environment.

The above technical purpose of the present invention can be achieved by the following technical solutions: a knife gate valve with heat preservation function comprises a valve body, wherein a valve cavity is formed in the valve body, a flow channel for fluid medium to circulate is formed in the valve body, a support is installed at the upper end of the valve body, a valve rod is vertically installed in the support, a gate plate which penetrates through the valve cavity and penetrates through the flow channel is fixedly installed at the lower end of the valve rod, the valve rod drives the gate plate to reciprocate along the axial direction of the valve rod so as to control the cut-off and communication of the flow channel, a heat preservation device is installed at one side of the valve body and comprises a shell, a medium inlet, a medium outlet, a first heat preservation passage, a push rod and a compression spring, the medium inlet and the medium outlet are respectively arranged at two corresponding ends of the shell, the first heat preservation passage is arranged in the shell and extends towards the valve body, and the medium inlet and the medium outlet are respectively connected with a, the two are respectively communicated with the first heat-preservation passage through corresponding medium passages; the valve body is provided with a second heat-preservation passage which communicates the valve cavity with the outside of the valve body, and the position of the second heat-preservation passage is matched with that of the first heat-preservation passage; a section of stroke groove is arranged in the shell, the push rod is positioned in the stroke groove and can slide along the direction of the stroke groove, sealing surfaces are arranged at the positions of the two medium passages relative to the push rod, and the push rod can abut against the sealing surfaces through sliding to simultaneously cut off the two medium passages; the shell is internally provided with a force application member which is used for applying force to the push rod and enabling the push rod to slide, the force application member is positioned on the other side of the push rod opposite to each sealing surface, the other side of the push rod opposite to each sealing member is also provided with the compression spring in a compression way, and the push rod has the tendency of moving towards each sealing surface to cut off two medium passages through the reset acting force generated by the compression spring; the medium inlet and the medium outlet are connected with pipelines extending outwards, two control valves used for controlling the pipelines to be communicated or cut off are arranged on the pipelines, and two execution handles used for operating hands are arranged on the control valves.

Further setting the following steps: and a high-temperature-resistant sealing ring is fixedly arranged at one end of the first heat-preservation passage facing the second heat-preservation passage.

Further setting the following steps: the casing in be provided with a pressure relief device, pressure relief device include the pressure release chamber and respectively with the pressure release import and the pressure release export that the pressure release chamber is linked together, pressure release import and first heat preservation route communicate mutually, pressure release export and casing outside be linked together, the pressure release intracavity be provided with ball and drive spring, ball and pressure release import offset and be used for sealing the pressure release import, drive spring and ball fixed connection and make the ball have towards the motion of pressure release import in order to with the closed trend of pressure release import.

Further setting the following steps: the force application member is a bolt, a thread groove is formed in the position, corresponding to the force application member, of the shell, and the bolt is screwed into the thread groove to apply force to the push rod.

Further setting the following steps: the medium inlet is positioned at the upper end of the shell, and the medium outlet is positioned at the lower end of the shell.

Further setting the following steps: the end of the push rod facing the sealing surface is regularly distributed with a plurality of circular arc bulges, and the positions of the sealing surface corresponding to the bulges are provided with grooves matched with the bulges.

Further setting the following steps: the one end of casing towards the valve body be provided with the installation department, and through the mode of installation department insert the screw with the casing fix on the valve body.

The utility model has the advantages that:

1. the heat preservation device is installed in valve body one side, pours into the hot-medium into through the medium entry, and the hot-medium loops through first heat preservation route and second heat preservation route and enters into the valve pocket to promote the temperature of valve pocket, the flashboard in the valve body passes the valve pocket, so can heat the flashboard through the hot-medium in the valve pocket, makes the flashboard keep the uniform temperature, avoids the flashboard to be difficult to the condition emergence of opening under low temperature environment.

2. The heat preservation device is also provided with a medium outlet, the heat medium entering the valve cavity from the medium inlet can sequentially pass through the second heat preservation passage and the first heat preservation passage and then is discharged from the medium outlet, and the purpose of heat medium circulation is achieved through the medium inlet and the medium outlet, so that the valve cavity can be stably maintained in a proper temperature range, and the phenomenon that the flashboard cannot be heated due to heat loss of the heat medium in the valve cavity is avoided.

3. To how quick convenient promotion push rod, the utility model discloses opposite side at the push rod face of sealing relatively is provided with the application of force spare, and the application of force spare adopts the bolt, and the bolt can offset with the push rod through precession thread groove to reach the ejector push rod, make the purpose that the push rod removed, have simple structure convenient operation's advantage.

4. The compression of the other side of the opposite sealing surface of the push rod is provided with a compression spring, and the reset acting force of the compression spring is utilized, so that the push rod can better abut against the sealing surface to play a role in auxiliary sealing, the sealing performance is ensured, and the whole structure is more reliable.

5. The high-temperature-resistant sealing ring is arranged, so that the sealing performance between the first heat-insulation passage and the second heat-insulation passage is effectively guaranteed, and the heat medium is prevented from leaking at the joint of the first heat-insulation passage and the second heat-insulation passage.

6. The arrangement of the bulge and the groove prolongs the surface path between the push rod and the sealing surface, thereby delaying and prolonging the distance of the heat medium between the push rod and the sealing surface to move, and when each medium path is in a cut-off state, the probability of heat medium leakage can be better reduced, and the sealing performance of the structure is ensured.

7. When the hot medium that pours into in the valve pocket too much, can have the valve pocket internal pressure intensity too big to cause leakage or trouble to take place, so the utility model discloses in order to avoid above-mentioned condition to take place, be provided with pressure relief device. When the pressure in the valve cavity is too high, the ball in the pressure relief device is pushed to compress the driving spring, and the ball is separated from the pressure relief inlet, and at the moment, the thermal medium in the valve cavity can be diffused to the pressure relief cavity through the pressure relief inlet and is discharged to the outside of the valve body through the pressure relief outlet, so that the pressure in the valve cavity is ensured to be stable; when the pressure in the valve cavity is stable, the ball can support against and seal the pressure relief inlet again under the action of the driving spring, so that the sealing property of the valve cavity is ensured, and the valve has the advantages of simple and reasonable structure and good practical application effect.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment;

fig. 2 is an enlarged view of a portion a in fig. 1.

In the figure: 11. a valve body; 12. a valve cavity; 13. a flow channel; 14. a support; 15. a valve stem; 16. a shutter plate; 21. a housing; 22. a media inlet; 23. a media outlet; 24. a first insulating pathway; 25. a push rod; 26. a compression spring; 27. a medium passage; 28. a sealing surface; 29. a stroke slot; 30. a force application member; 31. a pipeline; 32. a control valve; 33. an actuating handle; 34. a high-temperature sealing ring; 35. a second insulating pathway; 36. a thread groove; 41. a protrusion; 42. a groove; 51. an installation part; 52. a screw; 61. a pressure relief cavity; 62. a pressure relief inlet; 63. a pressure relief outlet; 64. a ball bearing; 65. a drive spring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the knife gate valve with the heat preservation function comprises a valve body 11, a valve cavity 12 is formed in the valve body 11, a flow passage 13 for a fluid medium to flow is formed in the valve body 11, a support 14 is installed at the upper end of the valve body 11, a valve rod 15 is vertically installed in the support 14, a gate plate 16 penetrating through the valve cavity 12 and penetrating through the flow passage 13 is fixedly installed at the lower end of the valve rod 15, and the valve rod 15 drives the gate plate 16 to reciprocate along the axial direction of the valve rod 15 so as to control the cutting and communication of the flow passage 13. The upper end of the valve rod 15 is generally provided with an actuator or handle (not shown) for driving the valve rod 15 to move up and down along its own axial direction, and at the same time, the valve rod 15 drives the shutter 16 to move synchronously, thereby utilizing the shutter 16 to realize the cutting and communication of the flow passage 13. The above structure is the basic structure of the knife gate valve, and belongs to the field of the prior art, so that the description is not provided herein.

A heat preservation device is arranged on one side of the valve body 11, the heat preservation device comprises a shell 21, a medium inlet 22, a medium outlet 23, a first heat preservation passage 24, a push rod 25 and a compression spring 26, the medium inlet 22 and the medium outlet 23 are respectively arranged at two corresponding ends of the shell 21, the first heat preservation passage 24 is arranged in the shell 21 and extends towards the valve body 11, the medium inlet 22 and the medium outlet 23 are respectively connected with a medium passage 27, and the medium inlet 22 and the medium outlet 23 are respectively communicated with the first heat preservation passage 24 through the corresponding medium passages 27; the valve body 11 is provided with a second heat preservation passage 35 which communicates the valve cavity 12 with the outside of the valve body 11, and the position of the second heat preservation passage 35 is matched with that of the first heat preservation passage 24. The medium inlet 22 is used for injecting a heat medium, such as hot steam, the medium outlet 23 is used for discharging the heat medium, and the cycle of injecting and discharging the hot steam can be formed through the medium inlet 22 and the medium outlet 23, so that the real-time temperature of the hot steam is ensured. In addition, the medium inlet 22 is located at the upper end of the casing 21, and the medium outlet 23 is located at the lower end of the casing 21, which effectively improves the efficiency of injecting and discharging the thermal medium.

A section of stroke groove 29 is arranged in the shell 21, the push rod 25 is positioned in the stroke groove 29 and can slide along the direction of the stroke groove 29, sealing surfaces 28 are arranged at the positions of the two medium passages 27 relative to the push rod 25, and the push rod 25 can abut against the sealing surfaces 28 through sliding to simultaneously cut off the two medium passages 27.

The housing 21 is provided with an urging member 30 for slidably urging the push rod 25, the urging member 30 is located on the other side of the push rod 25 with respect to the seal surfaces 28, the compression spring 26 is provided to compress the push rod 25 with respect to the seal members, and the push rod 25 tends to move toward the seal surfaces 28 by the return urging force of the compression spring 26 to block the two medium passages 27.

In the present embodiment, the biasing member 30 is a bolt, a screw groove 36 is formed in the housing 21 at a position corresponding to the biasing member 30, and the bolt is screwed into the screw groove 36 to apply a biasing force to the push rod 25.

The medium inlet 22 and the medium outlet 23 are connected with pipelines 31 extending outwards, two pipelines 31 are provided with control valves 32 for controlling connection or disconnection of the pipelines, and two control valves 32 are provided with execution handles 33 for operating by hands. The two pipes 31 need to be made of a high temperature resistant material for injecting hot steam, and the two pipes 31 are installed by screws 52. In this embodiment, the control valve 32 is a ball valve.

One end of the first heat preservation passage 24 facing the second heat preservation passage 35 is fixedly provided with a high temperature resistant sealing ring 34, and the sealing performance between the first heat preservation passage 24 and the second heat preservation passage 35 can be enhanced through the high temperature resistant sealing ring 34.

Be provided with a pressure relief device in the casing 21, pressure relief device includes pressure release chamber 61 and the pressure release import 62 and the pressure release export 63 that are linked together with pressure release chamber 61 respectively, pressure release import 62 is linked together with first heat preservation route 24, pressure release export 63 is linked together with the casing 21 outside, be provided with ball 64 and drive spring 65 in the pressure release chamber 61, ball 64 offsets with pressure release import 62 and is used for sealing pressure release import 62, drive spring 65 and ball 64 fixed connection and make ball 64 have the trend towards pressure release import 62 motion in order to with pressure release import 62 confined. When the pressure generated by the hot steam in the valve cavity 12 is too high, the ball 64 is pushed and the driving spring 65 is compressed, and the hot steam is discharged out of the valve body 11 through the pressure relief inlet 62, the pressure relief cavity 61 and the pressure relief outlet 63 in sequence; when a suitable amount of hot vapor is exhausted, the pressure in the valve chamber 12 returns to normal, and the ball 64 reseals the relief inlet 62 under the return force of the return spring.

A plurality of arc-shaped bulges 41 are regularly distributed on one end of the push rod 25 facing the sealing surface 28, and grooves 42 matched with the bulges 41 are arranged at the positions of the sealing surface 28 corresponding to the bulges 41.

The end of the housing 21 facing the valve body 11 is provided with a mounting portion 51, and the housing 21 is fixed on the valve body 11 by inserting a screw 52 into the mounting portion 51, so that the mounting and dismounting are very convenient.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a knife gate valve with heat preservation function, includes valve body (11), valve body (11) in seted up a valve pocket (12), valve body (11) in seted up runner (13) that supply the fluid medium circulation, valve body (11) upper end install support (14), support (14) in vertically install valve rod (15), the lower extreme fixed mounting of this valve rod (15) has flashboard (16) that pass valve pocket (12) and wear to establish to runner (13), thereby valve rod (15) drive flashboard (16) cut off and the UNICOM of axial along valve rod (15) carrying out reciprocating motion control runner (13), its characterized in that:

the heat preservation device is installed on one side of the valve body (11), the heat preservation device comprises a shell (21), a medium inlet (22), a medium outlet (23), a first heat preservation passage (24), a push rod (25) and a compression spring (26), the medium inlet (22) and the medium outlet (23) are respectively arranged at two corresponding ends of the shell (21), the first heat preservation passage (24) is arranged in the shell (21) and extends towards the valve body (11), the medium inlet (22) and the medium outlet (23) are respectively connected with a medium passage (27), and the medium inlet (22) and the medium outlet (23) are respectively communicated with the first heat preservation passage (24) through the corresponding medium passages (27); the valve body (11) is provided with a second heat-preservation passage (35) which is used for communicating the valve cavity (12) with the outside of the valve body (11), and the position of the second heat-preservation passage (35) is matched with that of the first heat-preservation passage (24);

a section of stroke groove (29) is arranged in the shell (21), the push rod (25) is positioned in the stroke groove (29) and can slide along the direction of the stroke groove (29), sealing surfaces (28) are arranged at the positions of the two medium passages (27) relative to the push rod (25), and the push rod (25) can abut against the sealing surfaces (28) through sliding to simultaneously cut off the two medium passages (27);

the shell (21) is internally provided with a force application member (30) for applying force to the push rod (25) and enabling the push rod to slide, the force application member (30) is positioned at the other side of the push rod (25) opposite to each sealing surface (28), the other side of the push rod (25) opposite to each sealing member is also provided with the compression spring (26) in a compression mode, and the push rod (25) has the tendency of moving towards each sealing surface (28) to cut off the two medium passages (27) through the reset acting force generated by the compression spring (26);

medium import (22) and medium export (23) all be connected with pipeline (31) that extend outwards, two pipeline (31) on all be provided with control valve (32) that are used for controlling its UNICOM or cut off, two control valve (32) on all be provided with execution handle (33) that supply the hand to operate.

2. The knife gate valve with the heat preservation function of claim 1, characterized in that: and a high-temperature-resistant sealing ring (34) is fixedly arranged at one end of the first heat-insulation passage (24) facing the second heat-insulation passage (35).

3. The knife gate valve with the heat preservation function of claim 1, characterized in that: casing (21) in be provided with a pressure relief device, pressure relief device include pressure release chamber (61) and respectively with pressure release chamber (61) pressure release import (62) and pressure release export (63) that are linked together, pressure release import (62) and first heat preservation route (24) be linked together, pressure release export (63) and casing (21) outside be linked together, pressure release chamber (61) in be provided with ball (64) and drive spring (65), ball (64) and pressure release import (62) offset and be used for sealing pressure release import (62), drive spring (65) and ball (64) fixed connection and make ball (64) have towards pressure release import (62) motion with the trend that will pressure release import (62) are closed.

4. The knife gate valve with the heat preservation function of claim 1, characterized in that: the force applying piece (30) is a bolt, a thread groove (36) is formed in the position, corresponding to the force applying piece (30), of the shell (21), and the bolt is screwed into the thread groove (36) to apply force to the push rod (25).

5. The knife gate valve with the heat preservation function of claim 1, characterized in that: the medium inlet (22) is positioned at the upper end of the shell (21), and the medium outlet (23) is positioned at the lower end of the shell (21).

6. The knife gate valve with the heat preservation function of claim 1, characterized in that: a plurality of arc-shaped bulges (41) are regularly distributed on one end of the push rod (25) facing the sealing surface (28), and grooves (42) matched with the bulges are formed in the positions, corresponding to the bulges (41), of the sealing surface (28).

7. The knife gate valve with the heat preservation function of claim 1, characterized in that: the valve is characterized in that one end of the shell (21) facing the valve body (11) is provided with a mounting part (51), and the shell (21) is fixed on the valve body (11) in a mode that a screw (52) is inserted into the mounting part (51).