CN113357388A - Parallel double-supporting-plate gate valve - Google Patents
Parallel double-supporting-plate gate valve Download PDFInfo
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- CN113357388A CN113357388A CN202110704599.7A CN202110704599A CN113357388A CN 113357388 A CN113357388 A CN 113357388A CN 202110704599 A CN202110704599 A CN 202110704599A CN 113357388 A CN113357388 A CN 113357388A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/12—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces
- F16K3/14—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with wedge-shaped arrangements of sealing faces with special arrangements for separating the sealing faces or for pressing them together
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/044—Construction of housing; Use of materials therefor of sliding valves slide valves with flat obturating members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/50—Mechanical actuating means with screw-spindle or internally threaded actuating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/60—Handles
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The invention belongs to the technical field of pipeline valves and discloses a parallel double-supporting-plate gate valve which comprises a valve body, a valve rod, a wedge pressing block, a first valve plate, a second valve plate and a rotating shaft, wherein the valve rod is arranged on the valve body; the valve body is provided with a control hole, the wedge pressing block is positioned in the control hole and provided with a T-shaped hole, and the rotating shaft is a T-shaped shaft and positioned in the T-shaped hole and can rotate relative to the wedge pressing block; the first valve plate is a wedge-shaped plate, the wedge-shaped surface of the first valve plate is parallel and opposite to the wedge-shaped surface of the wedge-shaped block, and the wedge-shaped surface of the first valve plate is provided with a first connecting groove; the second valve plate is a wedge-shaped plate, a wedge-shaped surface of the second valve plate is parallel and opposite to the other wedge-shaped surface of the wedge-shaped block, and a second connecting groove is formed in the wedge-shaped surface of the second valve plate; the valve rod drives the wedge pressing block to move along the control hole; the wedge briquetting can enough drive first valve plate and second valve plate through the rotation axis and move, and the wedge briquetting also can move for first valve plate and second valve plate. The parallel double-supporting-plate gate valve can meet the requirements of different installation modes, and has better stability and reliability.
Description
Technical Field
The invention belongs to the technical field of pipeline valves, and particularly relates to a parallel double-supporting-plate gate valve.
Background
The gate valve is used for controlling the medium flowing through the pipeline on the transportation pipeline or equipment to be fully opened or fully closed, and is mainly applied to the fields of petroleum, natural gas, chemical industry and the like. In China, the traditional gate valves produced at present mainly comprise flat gate valves and wedge gate valves. The flat gate valve has the advantages that the output force of the actuating mechanism is small, and the opening and closing operation is stable; the wedge gate valve has the advantages of good sealing performance, long service life and the like, but has the defect that the operating force of the valve is large and is twice that of a flat gate valve, so that the vibration force is large when the valve is opened, and the normal work of other instruments on a pipeline can be influenced.
In addition, the parallel double-supporting plate gate valve in the prior art comprises a valve body, a pair of valve plates, a valve rod and a pair of supporting plates, wherein a wedge pressing block is arranged between the pair of valve plates, the pair of valve plates are arranged on the wedge pressing block, and the valve rod is connected with the wedge pressing block. For the parallel double-supporting-plate gate valve, when the wedge block rises, the supporting plate slides downwards due to the dead weight of the wedge block, so that the tensioning surface of the valve plate and the valve seat is loosened, and the valve can be opened along with the rising of the valve rod. However, the parallel double-bracing plate gate valve of the prior art has the following technical problems in practical use:
1. the parallel double-supporting-plate gate valve in the prior art can only be installed in the vertical direction, so that the supporting plates can fall down by means of dead weight, and when the gate valve is installed transversely, the supporting plates cannot move on the wedge pressing block, so that the gate valve cannot be opened and closed, and the parallel double-supporting-plate gate valve cannot be normally used;
2. the parallel double-support-plate gate valve in the prior art is often clamped with the valve plate due to impurities in a medium, or the valve plate is supported in advance when not moving to a specified position due to overlarge friction force between the valve plate and the valve body, so that the gate valve cannot be normally closed, and the stability and reliability of the parallel double-support-plate gate valve are poor.
Disclosure of Invention
Aiming at the problems existing in the use process of the parallel double-supporting-plate gate valve in the prior art, the invention provides a parallel double-supporting-plate gate valve with a brand new structure. The parallel double-supporting-plate gate valve comprises a valve body, a valve rod, a wedge pressing block, a first valve plate, a second valve plate and a rotating shaft; the valve body is provided with an inlet, an outlet and a control hole, and the control hole penetrates through the space between the inlet and the outlet; the wedge pressing block is positioned in the control hole and can reciprocate along the axial direction of the control hole, and a T-shaped hole for communicating the two wedge surfaces with the bottom surface is formed in the wedge pressing block; the rotating shaft is a T-shaped shaft, is positioned in the T-shaped hole of the wedge block and can rotate back and forth relative to the wedge block, so that the horizontal end of the rotating shaft extends out of the horizontal hole of the T-shaped hole and retracts to the horizontal hole of the T-shaped hole; the first valve plate is a wedge-shaped plate and is positioned in the control hole, a wedge-shaped surface of the first valve plate is parallel and opposite to a wedge-shaped surface of the wedge-shaped block, and the wedge-shaped surface of the first valve plate is provided with a first connecting groove for accommodating the horizontal end of the rotating shaft; the second valve plate is a wedge-shaped plate and is positioned in the control hole, a wedge-shaped surface of the second valve plate is parallel and opposite to the other wedge-shaped surface of the wedge-shaped block, and a second connecting groove is formed in the wedge-shaped surface of the second valve plate to accommodate the horizontal end of the rotating shaft; one end of the valve rod extends into the control hole and is connected with the wedge pressing block so as to drive the wedge pressing block to reciprocate along the axial direction of the control hole; the wedge block can drive the first valve plate and the second valve plate to reciprocate in the control hole in a wedge surface non-extrusion mode through the rotating shaft, and the wedge block can reciprocate in the axial direction of the control hole in a wedge surface extrusion mode relative to the first valve plate and the second valve plate.
Preferably, the parallel double-supporting-plate gate valve further comprises a control assembly; the control assembly is located between the wedge pressing block and the rotating shaft so as to drive the rotating shaft to rotate in a reciprocating mode relative to the wedge pressing block.
Further preferably, the control assembly comprises a control lever; the control rod is positioned in a vertical hole of the T-shaped hole and can perform reciprocating linear movement relative to the wedge pressing block; one end of the control rod extends out of the T-shaped hole, and the other end of the control rod is connected with the rotating shaft so as to drive the rotating shaft to rotate in a reciprocating mode relative to the wedge pressing block.
Further preferably, the outer periphery of the control rod is provided with a protrusion, a sliding groove along the axial direction of the vertical hole in the T-shaped hole is formed in the vertical hole, and the protrusion extends into the sliding groove and can move back and forth along the sliding groove.
Further preferably, the control assembly includes a first elastic member, a guide groove, and a guide pin; the first elastic piece is positioned between the wedge pressing block and the control rod so as to drive the control rod to extend out of the vertical hole of the T-shaped hole; the guide groove and the guide pin are located at a connection position of the control lever and the rotating shaft, and the guide pin is capable of reciprocating along the guide groove to drive the rotating shaft to perform linear movement and circular rotation with respect to the control lever.
Further preferably, the control assembly comprises a second elastic member; the second elastic piece is positioned between the wedge pressing block and the rotating shaft so as to drive the rotating shaft to rotate relative to the wedge pressing block; the guide groove comprises a first axial groove, a first circumferential groove, a second axial groove and a first inclined groove, the first axial groove is formed from bottom to top along the axial direction of the vertical hole, the first circumferential groove is formed along the circumferential direction of the vertical hole, the starting end of the first circumferential groove is communicated with the upper end of the first axial groove, the starting end of the first inclined groove is communicated with the terminal end of the first circumferential groove, the terminal end of the first inclined groove is communicated with the lower end of the first axial groove, the second axial groove is parallel to the first axial groove, and the lower end of the second axial groove is communicated with the terminal end of the first circumferential groove.
Further preferably, the control assembly comprises a limit table; the limiting table is located at the terminal position of the first chute, so that the guide pin enters the first axial groove from the first chute in a one-way mode.
Further preferably, the control assembly comprises a third elastic member; the third elastic piece is connected with the guide pin to drive the guide pin to extend into the guide groove.
Preferably, the valve stem is provided with an external threaded section and forms a threaded connection with the valve body.
Further preferably, the parallel double-strut gate valve comprises a handle; the handle is connected with the valve rod to drive the valve rod to rotate in a reciprocating mode.
Compared with the parallel double-support-plate gate valve with the existing structure form, in the parallel double-support-plate gate valve, the rotating shaft is arranged in the wedge pressing block, and the wedge pressing block is connected with and disconnected from the first valve plate and the second valve plate in the reciprocating rotation process of the rotating shaft relative to the wedge pressing block, so that the moving relation between the wedge pressing block and the first valve plate and the second valve plate is changed, the wedge pressing block can directly drive the first valve plate and the second valve plate to synchronously move in the opening and closing process, and the first valve plate and the second valve plate are extruded relatively to move after moving in place, so that the inlet and the outlet are sealed. Like this, not only can carry out accurate drive control to first valve plate and second valve plate, satisfy the installation in the different environment and use, drive first valve plate and second valve plate at the wedge briquetting moreover and remove the in-process and can avoid first valve plate and second valve plate to receive the card of impurity in the medium stifled, guarantee the smooth and easy removal to first valve plate and second valve plate. Simultaneously, the friction that first valve plate and second valve plate that can also greatly reduced removed the in-process and valve body formation improves the protection to first valve plate and second valve plate and to the protection of import and export sealing member, prolongs the life of whole parallel double bracing board gate valve, has better stability and reliability.
Drawings
FIG. 1 is a schematic cross-sectional view of a parallel dual-supporting plate gate valve in an open state according to the present embodiment;
FIG. 2 is a schematic cross-sectional view illustrating the structure of the parallel double-supporting-plate gate valve according to the present embodiment when the rotating shaft rotates to retract;
FIG. 3 is a schematic cross-sectional view of the parallel dual-supporting plate gate valve of the present embodiment in a closed state;
FIG. 4 is a schematic cross-sectional view of the parallel double-strut gate valve of the present embodiment when the rotating shaft is rotated to extend;
FIG. 5 is a schematic diagram illustrating a first perspective structural configuration of a rotating shaft of the parallel double-strut gate valve according to the present embodiment;
FIG. 6 is a schematic diagram of a second perspective outline of the rotating shaft of the parallel double-strut gate valve according to the present embodiment.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1 to 6, the parallel double-bracing plate gate valve of the present embodiment includes a valve body 1, a valve rod 2, a wedge block 3, a first valve plate 4, a second valve plate 5, and a rotating shaft 6.
The valve body 1 is provided with an inlet 11, an outlet 12 and a control hole 13, wherein the control hole 13 passes through between the inlet 11 and the outlet 12.
The wedge block 3 is located inside the control hole 13 and can reciprocate in the axial direction of the control hole 13, and a T-shaped hole 31 that communicates the two wedge surfaces with the bottom surface is provided in the wedge block 3. The rotating shaft 6 is a T-shaped shaft, is positioned in the T-shaped hole 31 of the wedge block 3, and can rotate back and forth relative to the wedge block 3, so that the horizontal end 61 of the rotating shaft 6 extends out of the horizontal hole of the T-shaped hole 31 and retracts into the horizontal hole of the T-shaped hole 31.
The first valve plate 4 is a wedge plate and is located in the control hole 13, a wedge surface of the first valve plate 4 is parallel-opposed to a wedge surface of the wedge block 3 corresponding to the inlet 11, and a first connecting groove 41 is provided on the wedge surface of the first valve plate 4 to accommodate a portion of the rotary shaft 6 where the horizontal end 61 protrudes from the horizontal hole in the T-shaped hole 31, thereby forming a connection between the wedge block 3 and the first valve plate 4 in the axial direction of the control hole 13.
The second valve plate 5 is a wedge plate and is located in the control hole 13, a wedge surface of the second valve plate 5 is parallel-opposed to one of the wedge surfaces of the wedge block 3 corresponding to the outlet 12, and a second connection groove 51 is provided on the wedge surface of the second valve plate 5 to accommodate a portion of the rotary shaft 6 where the horizontal end 61 protrudes from the horizontal hole in the T-shaped hole 31, thereby forming a connection between the wedge block 3 and the second valve plate 5 in the axial direction of the control hole 13.
The valve rod 2 is arranged along the axial direction of the control hole 13, one end of the valve rod is positioned outside the valve body 1, and the other end of the valve rod is positioned inside the control hole 13 and connected with the wedge block 3 so as to drive the wedge block 3 to perform reciprocating linear movement along the axial direction of the control hole 13.
In the process that the valve rod 2 drives the wedge block 3 to perform reciprocating linear movement along the axial direction of the control hole 13, when the rotating shaft 6 rotates relative to the wedge block 3 to enable the horizontal end 61 of the rotating shaft to extend out of the T-shaped hole 31 and extend into the first connecting groove 41 and the second connecting groove 51, the wedge block 3 can drive the first valve plate 4 and the second valve plate 5 to perform reciprocating movement in the control hole 13 in a wedge surface non-extrusion mode through the rotating shaft 6, namely under the condition that the wedge surface in the wedge block 3, the wedge surface in the first valve plate 4 and the wedge surface in the second valve plate 5 do not form extrusion action, the wedge block 3 drives the first valve plate 4 and the second valve plate 5 to perform reciprocating movement along the axial direction of the control hole 13; on the contrary, when the rotating shaft 6 rotates relative to the wedge block 3 to make the horizontal end 61 retract into the T-shaped hole 31 and disengage from the connection with the first connection groove 41 and the second connection groove 51, the wedge block 3 can reciprocate relative to the first valve plate 4 and the second valve plate 5 in the axial direction of the control hole 13 in the form of wedge surface extrusion, that is, during the axial movement of the wedge block 3 relative to the first valve plate 4 and the second valve plate 5 along the control hole 13, the two wedge surfaces of the wedge block 3 respectively contact with and form extrusion with the wedge surface of the first valve plate 4 and the wedge surface of the second valve plate 5.
Preferably, a control assembly is further provided in the parallel double-strut gate valve of the present embodiment. The control assembly is located between the wedge pressing block and the rotating shaft to drive the rotating shaft to rotate in the T-shaped hole in a reciprocating mode relative to the wedge pressing block, so that the horizontal end in the rotating shaft is controlled to extend out and retract relative to the T-shaped hole, and the wedge pressing block is further controlled to be connected with the first valve plate and the second valve plate.
In this embodiment, the control assembly is provided with a control lever 71, a first elastic member 72, a guide groove 73 and a guide pin 74. Wherein the control rod 71 is located in a vertical hole of the T-shaped hole 31 and can perform reciprocating linear movement relative to the wedge block 3 inside the T-shaped hole 31, while one end of the control rod 71 protrudes out of the T-shaped hole 31 and the other end is provided with a connection hole 711 to receive the vertical end of the rotating shaft 6, thereby forming a connection between the control rod 71 and the rotating shaft 6. The first elastic member 72 is a coil spring, and is located between the wedge block 3 and the control rod 71 to drive the control rod 71 to extend out of the vertical hole of the T-shaped hole 31. A guide groove 73 is opened on an outer surface of a vertical end of the rotary shaft 6, a guide pin 74 is fixed radially inside the connection hole 711, and the guide pin 74 is inserted into the guide groove 73 to be movable along the guide groove 73 to drive the rotary shaft 6 to linearly move and circumferentially rotate with respect to the control lever 71.
At this moment, when the wedge briquetting drove the control lever to being close to the import and export direction and making the control lever and control hole terminal position department valve body form the contact, drive the wedge briquetting through the valve rod and just continue to move and just can make the control lever overcome the effort of first elastic component and move along the vertical hole in T shape hole to rotate for the wedge briquetting through guide way and uide pin drive rotation axis, make the horizontal end of rotation axis rotate to stretching out T shape hole and stretching into first connecting groove and second connecting groove. On the contrary, under the action of the restoring force of the first elastic piece, the wedge pressing block linearly moves in the opposite direction relative to the control rod, so that the rotating shaft is driven to rotate in the opposite direction relative to the wedge pressing block under the action of the guide groove and the guide pin, the horizontal end of the rotating shaft reversely rotates and retracts into the T-shaped hole, the wedge pressing block is disconnected with the first valve plate and the second valve plate, and the wedge pressing block can move relative to the first valve plate and the second valve plate.
Therefore, the axial acting force formed by the control rod and the wedge pressing block by the first elastic piece and the acting force formed by the control rod and the wedge pressing block by the matching of the guide groove and the guide pin are used for forming the acting force along the circumferential direction, so that the rotation control of the rotating shaft is formed by the driving control of the valve rod on the wedge pressing block, and the control of the connection relation of the wedge pressing block with the first valve plate and the second valve plate is further formed.
In the embodiment, a protrusion 712 is disposed on the outer circumferential surface of the control rod 71, a sliding slot 311 is disposed in the vertical hole of the T-shaped hole 31 along the axial direction thereof, and the protrusion 712 extends into the sliding slot 311 and can reciprocate along the sliding slot 311, so as to ensure that the control rod 71 only reciprocates linearly along the axial direction of the control hole 13 relative to the wedge block 3, and further ensure that the rotating shaft 6 rotates reciprocally. In other embodiments, the control rod may be directly processed into a square rod structure, and the vertical hole of the T-shaped hole may be processed into a corresponding square hole, so as to ensure that the control rod only performs reciprocating linear movement along the axial direction of the control hole relative to the wedge block.
Further, as shown in fig. 1, 5 and 6, the control assembly of the present embodiment is further provided with a second elastic member 75. Wherein, the second elastic member 75 is a torsion spring and is located between the wedging block 3 and the rotating shaft 6 to drive the rotating shaft 6 to rotate unidirectionally relative to the wedging block 3. Meanwhile, the guide groove 73 of the present embodiment includes a first axial groove 731, a first circumferential groove 732, a first inclined groove 733, and a second axial groove 734, the first axial groove 731 is opened from bottom to top in the axial direction of the vertical hole, the first circumferential groove 732 is opened in the circumferential direction of the vertical hole and the starting end of the first circumferential groove 732 communicates with the upper end of the first axial groove 731, the starting end of the first inclined groove 733 communicates with the terminal end of the first circumferential groove 732, the terminal end of the first inclined groove 733 communicates with the lower end of the first axial groove 731, so that the first axial groove 731, the first circumferential groove 732, and the first inclined groove 733 form a right triangle groove in an end-to-end connection manner, the second axial groove 734 is parallel to the first axial groove 731, and the lower end of the second axial groove 734 communicates with the terminal end of the first circumferential groove 732.
When the rotating shaft rotates relative to the wedge block to enable the horizontal end of the rotating shaft to extend out of the T-shaped hole, so that the wedge block is connected with the first valve plate and the second valve plate, the guide pin is located at the lowest end of the first axial groove. The valve rod drives the wedge block to move towards the terminal direction of the control hole, namely towards the direction close to the inlet and the outlet, after the control rod moves to the terminal of the control hole along with the wedge block and is contacted with the valve body, in the process that the wedge block continuously moves towards the terminal position of the control hole by overcoming the acting force of the first elastic piece, the rotating shaft drives the first axial groove to move relative to the first guide pin, so that the guide pin moves to the upper end of the first axial groove, the horizontal end of the rotating shaft moves in the first connecting groove and the second connecting groove, meanwhile, two wedge surfaces of the wedge block are respectively contacted with the wedge surface of the first valve plate and the wedge surface of the second valve plate, at the moment, the rotating shaft rotates relative to the control rod under the action of the second elastic piece, so that the first circumferential groove moves relative to the guide pin, when the guide pin moves to the terminal position of the first circumferential groove, the horizontal end of the rotating shaft is just retracted into the T-shaped hole. And then the valve rod drives the wedge pressing block to overcome the acting force of the first elastic piece and move continuously towards the terminal direction of the control hole, so that the guide groove enters the second axial groove, and the wedge pressing block extrudes the first valve plate and the second valve plate. When the valve rod is released from driving the wedge pressing block, the control rod drives the wedge pressing block to move relatively along the second axial groove relative to the rotating shaft under the action of the restoring force of the first elastic piece, so that the guide pin moves to the terminal position of the first circumferential groove, thereby releasing the wedge block from pressing the first valve plate and the second valve plate, under the action of the restoring force of the first elastic piece and the second elastic piece, wherein the restoring force of the first elastic member is greater than the acting force of the second elastic member, so that the rotating shaft starts to move relative to the control lever against the acting force of the second elastic member, the guide pin moves relative to the first inclined groove and moves to the terminal end of the first inclined groove, in the process, the rotating shaft rotates reversely relative to the wedge block, so that the horizontal end of the rotating shaft extends out of the T-shaped hole and extends into the first connecting groove and the second connecting groove, and the wedge block is connected with the first valve plate and the second valve plate again. In this way, the wedge block is caused to reciprocate relative to the first valve plate and the second valve plate during one rotation of the guide pin relative to the guide groove, thereby completing the operation of pressing and releasing the pressing of the wedge block on the first valve plate and the second valve plate.
Further, a limit stop 76 is provided in the control assembly of this embodiment. The position-limiting table 76 is located at a terminal position of the first inclined groove 733, so that the guide pin 74 is guided into the first axial groove 731 in a single direction from the first inclined groove 733, and thus the guide pin 74 can be stabilized in the first axial groove 731 without being directly guided into the first inclined groove 733 by the second elastic member 75, thereby ensuring accurate movement of the guide pin 74 relative to the guide groove 73.
Meanwhile, a third elastic member 77 is provided in the control assembly of the present embodiment. The third elastic member 77 is connected to the guide pin 74 to drive the guide pin 74 to extend into the guide groove 73 and ensure that the guide pin 74 can smoothly pass over the position restricting table 76 into the first axial groove 731. In the control assembly of other embodiments, the first chute can be designed into a slope structure form, so that a limiting step is directly formed between the terminal end of the first chute and the lower end of the first axial groove, and the independent arrangement of the limiting table is omitted.
In this embodiment, by adopting the cooperation of the guide groove formed by the first axial groove, the first circumferential groove, the first inclined groove, and the second axial groove and the guide pin, and by means of the first elastic member and the second elastic member, the rotation control of the rotating shaft with respect to the wedge block is realized, and at the same time, the guide for pressing the first valve plate and the second valve plate by means of the wedge block is formed by means of the second axial groove. In other embodiments, the guide groove may be designed as a threaded groove, and the size of the threaded groove and the size of the gap between the wedge block and the first valve plate and the second valve plate may be adjusted, or the guide pin may be moved along the threaded groove to rotate the rotary shaft back and forth relative to the wedge block, and the second axial groove connected to the threaded groove may be provided to form a guide for pressing the first valve plate and the second valve plate by the wedge block.
In addition, in the present embodiment, the horizontal end of the rotating shaft is extended or retracted into the T-shaped hole by the rotation control of the rotating shaft with respect to the wedge block. In other embodiments, if the operating condition of the parallel double-bracing-plate gate valve allows, for example, for the transportation of inert gas media, the horizontal end of the rotating shaft can also directly adopt the structural form of an electric pole, and the extension and the recovery of the horizontal end in the rotating shaft can be directly controlled in a remote electric control mode, so that the control component is replaced to carry out rotary driving on the rotating shaft to form the extension and recovery control on the horizontal end in the rotating shaft.
Referring to fig. 1, in the parallel dual-strut gate valve of the present embodiment, the valve stem 2 is formed by combining a stem section, which passes through the valve body 1 and is connected to the wedge block 3, and an external thread section, which is screwed to the external structure of the valve body 1. Thus, the valve rod is rotated to and fro, so that the wedge pressing block can move to and fro along the axial direction of the control hole.
In addition, a handle 8 is provided at an end of the valve stem 2 to drive the valve stem 2 to rotate reciprocally. Similarly, in other embodiments, a motor may be provided at the end of the valve stem to provide electrical drive control of the valve stem. Even in other embodiments, the valve rod is directly connected with the wedge block through the extending end of the electric pole, so that the wedge block is directly driven to perform reciprocating linear movement.
Referring to fig. 1 to 6, the operation process of the parallel double-supporting-plate gate valve of the present embodiment for controlling the opening and closing of the pipeline is as follows:
when the parallel double-support-plate gate valve needs to be closed to cut off the communication of a pipeline between an inlet and an outlet, firstly, the handle 8 is rotated, the valve rod 2 drives the wedge block 3 to move along the axial direction of the control hole 13, at the moment, the wedge block 3 drives the first valve plate 4 and the second valve plate 5 to move together through the horizontal end of the rotating shaft 6, and when the first valve plate 4 moves to the inlet 11 and the second valve plate 5 moves to the outlet 12, the control rod 71 moves along with the wedge block 3 to be in contact with a valve body at the terminal of the control hole 13; then, the handle 8 is rotated continuously, the wedge-pressing block 3 is driven by the valve rod 2 to overcome the acting force of the first elastic piece 72 and move continuously towards the terminal direction of the control hole 13, the wedge block 3 is linearly moved relative to the control rod 71 through the protrusion 712 and the slide slot 311, the guide pin 74 is moved to the upper end of the first axial slot 731, the horizontal end of the rotating shaft 6 is translated in the first connecting slot 41 and the second connecting slot 51, two wedge surfaces of the wedge block 3 are respectively in contact with the wedge surface of the first valve plate 4 and the wedge surface of the second valve plate 5, and then the rotation of the handle 8 is stopped, when the rotation shaft 6 is rotated with respect to the wedge block 3 by the second elastic member 75, and the guide pin 74 is moved to the terminal end position of the first circumferential groove 732, the horizontal section of the rotating shaft 6 is completely retracted into the T-shaped hole 31, and the wedge pressing block 3 is disconnected with the first valve plate 4 and the second valve plate 5; then, the handle 8 is further rotated, the valve rod 2 drives the wedge block 3 to continuously move towards the terminal direction of the control hole 13 against the acting force of the first elastic piece 72, so that the wedge block 3 relatively moves with respect to the first valve plate 4 and the second valve plate 5, the first valve plate 4 and the second valve plate 5 are squeezed, the inlet 11 and the outlet 12 are sealed and blocked, meanwhile, the guide pin 74 enters the second axial groove 734, the rotation of the handle 8 is stopped, the parallel double-support-plate gate valve is closed, and the pipeline communication between the inlet 11 and the outlet 12 is cut off.
When the parallel double-supporting-plate gate valve needs to be opened to communicate a pipeline between an inlet and an outlet, firstly, the handle 8 is rotated reversely, the wedge block 3 is driven by the valve rod 2 to move along the axial direction of the control hole 13 by virtue of the restoring acting force of the first elastic piece 72, at the moment, the guide pin 74 moves to the terminal position of the first circumferential groove 732 along the second axial groove 734, and the wedge block 3 moves to release the extrusion on the first valve plate 4 and the second valve plate 5 along the axial direction of the control hole 13; then, the handle 8 is rotated continuously, the guide pin 74 is moved along the first inclined groove 733 and passes through the limit table 76 to enter the first axial groove 731 by virtue of the restoring force of the first elastic member 72 and overcoming the force of the second elastic member 75, so that the rotating shaft 6 is driven to rotate reversely relative to the wedge block 3, the wedge block 3 is moved to form a gap with the first valve plate 4 and the second valve plate 5, and the horizontal end of the rotating shaft 6 extends out of the T-shaped hole 31 and into the first connecting groove 41 and the second connecting groove 51, so that the connection between the wedge block 3 and the first valve plate 4 and the second valve plate 5 is formed; then, the handle 8 is rotated continuously, the valve rod 2 drives the wedge block 3 to move along the axial direction of the control hole 13, at the moment, the wedge block 3 drives the first valve plate 4 and the second valve plate 5 to move together through the horizontal end of the rotating shaft 6, after the first valve plate 4 is removed from the inlet 11 and the second valve plate 5 is removed from the outlet 12, the rotation of the handle 8 is stopped, and the parallel double-support-plate gate valve is opened, so that the pipelines between the inlet 11 and the outlet 12 are communicated.
Claims (10)
1. A parallel double-supporting-plate gate valve is characterized by comprising a valve body, a valve rod, a wedge pressing block, a first valve plate, a second valve plate and a rotating shaft; the valve body is provided with an inlet, an outlet and a control hole, and the control hole penetrates through the space between the inlet and the outlet; the wedge pressing block is positioned in the control hole and can reciprocate along the axial direction of the control hole, and a T-shaped hole for communicating the two wedge surfaces with the bottom surface is formed in the wedge pressing block; the rotating shaft is a T-shaped shaft, is positioned in the T-shaped hole of the wedge block and can rotate back and forth relative to the wedge block, so that the horizontal end of the rotating shaft extends out of the horizontal hole of the T-shaped hole and retracts to the horizontal hole of the T-shaped hole; the first valve plate is a wedge-shaped plate and is positioned in the control hole, a wedge-shaped surface of the first valve plate is parallel and opposite to a wedge-shaped surface of the wedge-shaped block, and the wedge-shaped surface of the first valve plate is provided with a first connecting groove for accommodating the horizontal end of the rotating shaft; the second valve plate is a wedge-shaped plate and is positioned in the control hole, a wedge-shaped surface of the second valve plate is parallel and opposite to the other wedge-shaped surface of the wedge-shaped block, and a second connecting groove is formed in the wedge-shaped surface of the second valve plate to accommodate the horizontal end of the rotating shaft; one end of the valve rod extends into the control hole and is connected with the wedge pressing block so as to drive the wedge pressing block to reciprocate along the axial direction of the control hole; the wedge block can drive the first valve plate and the second valve plate to reciprocate in the control hole in a wedge surface non-extrusion mode through the rotating shaft, and the wedge block can reciprocate in the axial direction of the control hole in a wedge surface extrusion mode relative to the first valve plate and the second valve plate.
2. The parallel dual-strut gate valve of claim 1, further comprising a control assembly; the control assembly is located between the wedge pressing block and the rotating shaft so as to drive the rotating shaft to rotate in a reciprocating mode relative to the wedge pressing block.
3. The parallel dual strut gate valve of claim 2 wherein said control assembly comprises a control rod; the control rod is positioned in a vertical hole of the T-shaped hole and can perform reciprocating linear movement relative to the wedge pressing block; one end of the control rod extends out of the T-shaped hole, and the other end of the control rod is connected with the rotating shaft so as to drive the rotating shaft to rotate in a reciprocating mode relative to the wedge pressing block.
4. The parallel double-bracing plate gate valve according to claim 3, wherein the outer circumference of the control rod is provided with a protrusion, the vertical hole of the T-shaped hole is provided with a sliding groove along the axial direction of the T-shaped hole, and the protrusion extends into the sliding groove and can reciprocate along the sliding groove.
5. The parallel dual strut gate valve of claim 3 wherein said control assembly comprises a first resilient member, a guide slot and a guide pin; the first elastic piece is positioned between the wedge pressing block and the control rod so as to drive the control rod to extend out of the vertical hole of the T-shaped hole; the guide groove and the guide pin are located at a connection position of the control lever and the rotating shaft, and the guide pin is capable of reciprocating along the guide groove to drive the rotating shaft to perform linear movement and circular rotation with respect to the control lever.
6. The parallel dual strut gate valve of claim 5 wherein said control assembly comprises a second resilient member; the second elastic piece is positioned between the wedge pressing block and the rotating shaft so as to drive the rotating shaft to rotate relative to the wedge pressing block; the guide groove comprises a first axial groove, a first circumferential groove, a second axial groove and a first inclined groove, the first axial groove is formed from bottom to top along the axial direction of the vertical hole, the first circumferential groove is formed along the circumferential direction of the vertical hole, the starting end of the first circumferential groove is communicated with the upper end of the first axial groove, the starting end of the first inclined groove is communicated with the terminal end of the first circumferential groove, the terminal end of the first inclined groove is communicated with the lower end of the first axial groove, the second axial groove is parallel to the first axial groove, and the lower end of the second axial groove is communicated with the terminal end of the first circumferential groove.
7. The parallel dual strut gate valve of claim 6 wherein said control assembly includes a stop; the limiting table is located at the terminal position of the first chute, so that the guide pin enters the first axial groove from the first chute in a one-way mode.
8. The parallel dual strut gate valve of claim 6 wherein said control assembly comprises a third resilient member; the third elastic piece is connected with the guide pin to drive the guide pin to extend into the guide groove.
9. The parallel dual strut gate valve of any one of claims 1 to 8 wherein said valve stem is provided with an externally threaded section and forms a threaded connection with said valve body.
10. The parallel dual strut gate valve of claim 9, wherein the parallel dual strut gate valve comprises a handle; the handle is connected with the valve rod to drive the valve rod to rotate in a reciprocating mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110704599.7A CN113357388B (en) | 2021-06-24 | 2021-06-24 | Parallel double-supporting-plate gate valve |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110704599.7A CN113357388B (en) | 2021-06-24 | 2021-06-24 | Parallel double-supporting-plate gate valve |
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| CN103410995A (en) * | 2013-06-27 | 2013-11-27 | 寿天泽 | Parallel double gate disc swing gate valve |
| CN106704618A (en) * | 2016-12-26 | 2017-05-24 | 凯喜姆阀门有限公司 | High-performance gate valve |
| CN106763848A (en) * | 2017-01-06 | 2017-05-31 | 鞍山电磁阀有限责任公司 | A kind of folding wedge face activity flashboard group driven using machinery and internal pressure |
| CN207122594U (en) * | 2017-08-30 | 2018-03-20 | 维强阀门科技有限公司 | A kind of adjustable seal gate valve |
| DE102018116741A1 (en) * | 2018-07-11 | 2020-01-16 | Z & J Technologies Gmbh | Slider, closure element, method and application |
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2021
- 2021-06-24 CN CN202110704599.7A patent/CN113357388B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103410995A (en) * | 2013-06-27 | 2013-11-27 | 寿天泽 | Parallel double gate disc swing gate valve |
| CN106704618A (en) * | 2016-12-26 | 2017-05-24 | 凯喜姆阀门有限公司 | High-performance gate valve |
| CN106763848A (en) * | 2017-01-06 | 2017-05-31 | 鞍山电磁阀有限责任公司 | A kind of folding wedge face activity flashboard group driven using machinery and internal pressure |
| CN207122594U (en) * | 2017-08-30 | 2018-03-20 | 维强阀门科技有限公司 | A kind of adjustable seal gate valve |
| DE102018116741A1 (en) * | 2018-07-11 | 2020-01-16 | Z & J Technologies Gmbh | Slider, closure element, method and application |
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| CN113357388B (en) | 2022-06-21 |
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Effective date of registration: 20220601 Address after: 325100 Baoyi Industrial Zone, Oubei Town, Wenzhou City, Zhejiang Province Applicant after: ZHEJIANG GUANZHENG VALVE CO.,LTD. Address before: 518001 science and technology building, No. 85, Taining Road, Cuizhu street, Luohu District, Shenzhen, Guangdong Applicant before: Yu Weiguang |
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Denomination of invention: A parallel double-brace gate valve Effective date of registration: 20221230 Granted publication date: 20220621 Pledgee: Industrial and Commercial Bank of China Limited Yongjia sub branch Pledgor: ZHEJIANG GUANZHENG VALVE CO.,LTD. Registration number: Y2022330003725 |