阅读说明：本技术 闸阀 (Gate valve ) 是由 朱昌军 张春生 谭建华 邹凯 杨刚 徐乐乐 韩占方 付江 薛原 王书国 张效东 于 2018-06-06 设计创作，主要内容包括：本发明提供一种闸阀,该闸阀包括：阀体、阀板、阀杆以及锁定装置；阀体内部设置有阀腔,阀腔在阀体的两端分别形成有进口和出口；阀体的侧壁上开设有伸缩孔,阀板由伸缩孔伸入到阀腔内；阀腔的内壁上设置有插槽,阀板插设在插槽内；插槽的底部设置有导轨,阀板上设置有与导轨配合的导向槽；阀板上开设有滑槽,阀杆上设置有滑块,滑块滑设在滑槽内；锁定装置设置在阀板上,用于阻止滑块向滑槽的外部移动；使得在导轨受到原油的腐蚀而脱落时,阀板在插槽内发生晃动,锁定装置可阻止滑块向滑槽的外部移动,进而避免滑块与滑槽分离,以免阀板与阀杆的脱离。(the present invention provides a gate valve, comprising: the valve comprises a valve body, a valve plate, a valve rod and a locking device; the valve cavity is arranged in the valve body, and an inlet and an outlet are respectively formed at two ends of the valve cavity; the side wall of the valve body is provided with a telescopic hole, and the valve plate extends into the valve cavity from the telescopic hole; the inner wall of the valve cavity is provided with a slot, and the valve plate is inserted in the slot; the bottom of the slot is provided with a guide rail, and the valve plate is provided with a guide groove matched with the guide rail; the valve plate is provided with a sliding chute, the valve rod is provided with a sliding block, and the sliding block is arranged in the sliding chute in a sliding manner; the locking device is arranged on the valve plate and used for preventing the sliding block from moving to the outside of the sliding chute; when the guide rail is corroded by crude oil and falls off, the valve plate rocks in the slot, and the locking device can prevent the sliding block from moving to the outside of the sliding groove, so that the sliding block is prevented from being separated from the sliding groove, and the valve plate is prevented from being separated from the valve rod.)

1. A gate valve, comprising: the valve comprises a valve body, a valve plate, a valve rod and a locking device; the valve cavity is arranged in the valve body, and an inlet and an outlet are respectively formed at two ends of the valve body; a telescopic hole is formed in the side wall of the valve body, and the valve plate extends into the valve cavity from the telescopic hole; the inner wall of the valve cavity is provided with a slot, and the valve plate is inserted in the slot; the bottom of the slot is provided with a guide rail, and the valve plate is provided with a guide groove matched with the guide rail; the valve plate is provided with a sliding groove, the valve rod is provided with a sliding block, and the sliding block is arranged in the sliding groove in a sliding manner; the locking device is arranged on the valve plate and used for preventing the sliding block from moving to the outside of the sliding groove.

2. The gate valve of claim 1, wherein the locking device comprises a locking post, a first locking hole is disposed on the valve plate, a second locking hole is disposed on the slider, and the locking post is inserted into the first locking hole and the second locking hole.

3. The gate valve of claim 2, wherein the inner wall of the first locking hole is provided with a first internal thread, and the locking post is provided with a first external thread engaged with the first internal thread.

4. The gate valve of claim 2, wherein the inner wall of the second locking hole is provided with a second internal thread, and the locking post is provided with a second external thread engaged with the second internal thread.

5. The gate valve according to claim 3 or 4, wherein the locking post is plural, the valve plate is provided with plural first locking holes, and the slider is provided with plural second locking holes; each locking column penetrates through one first locking hole and one second locking hole.

6. The gate valve of claim 1, wherein the locking device comprises a stopping post and a locking spring, the sliding block is provided with a sliding hole, the stopping post is inserted into the sliding hole, and two ends of the locking spring are respectively connected with the stopping post and the bottom of the sliding hole; a groove is formed in the side wall of the sliding groove; the locking spring is used for abutting against the stopping column so as to drive the stopping column to extend into the groove.

7. The gate valve of claim 6, wherein said stop post and said locking spring are each a plurality of, each of said locking spring and said stop post being disposed through one of said sliding holes.

8. The gate valve of claim 1, further comprising a valve cover and a driving device, wherein the valve cover covers the outside of the telescopic hole, a shaft hole is formed in the valve cover, the valve rod is arranged in the shaft hole in a penetrating manner, and the top end of the valve rod is in transmission connection with the driving device.

9. The gate valve of claim 8, wherein the driving device comprises a driving wheel, the driving wheel is coaxially arranged with the valve rod, a driving threaded hole is formed in the driving wheel, a driving external thread matched with the driving threaded hole is formed in the valve rod, and the driving wheel is rotatably connected with the valve cover.

10. the gate valve of claim 8, wherein a sealing ring is disposed between the valve cover and the valve body.

Technical Field

The invention relates to the technical field of fluid conveying equipment, in particular to a gate valve.

background

In the process of extracting oil or natural gas (oil and gas for short), crude oil and gas in an oil and gas well are conveyed to a storage device or a combined station through a pipeline; therefore, how to control the on-off of the pipeline and further ensure the safe operation of the process becomes the key of research.

Disclosure of Invention

In view of this, the invention provides a gate valve to solve the technical problems that after the gate valve is used for a period of time, impurities in oil gas can corrode part of a guide rail, so that a valve plate moves in a slot, and a sliding block easily slides out of a sliding groove after the valve plate moves, so that a valve rod is separated from the valve plate.

The invention provides a gate valve, comprising: the valve comprises a valve body, a valve plate, a valve rod and a locking device; the valve cavity is arranged in the valve body, and an inlet and an outlet are respectively formed at two ends of the valve body; a telescopic hole is formed in the side wall of the valve body, and the valve plate extends into the valve cavity from the telescopic hole; the inner wall of the valve cavity is provided with a slot, and the valve plate is inserted in the slot; the bottom of the slot is provided with a guide rail, and the valve plate is provided with a guide groove matched with the guide rail; the valve plate is provided with a sliding groove, the valve rod is provided with a sliding block, and the sliding block is arranged in the sliding groove in a sliding manner; the locking device is arranged on the valve plate and used for preventing the sliding block from moving to the outside of the sliding groove.

In the gate valve as described above, preferably, the locking device includes a locking post, a first locking hole is provided on the valve plate, a second locking hole is provided on the slider, and the locking post is inserted into the first locking hole and the second locking hole.

In the gate valve, preferably, a first internal thread is provided on an inner wall of the first locking hole, and a first external thread matched with the first internal thread is provided on the locking post.

in the gate valve, preferably, a second internal thread is provided on an inner wall of the second locking hole, and a second external thread that is engaged with the second internal thread is provided on the locking post.

In the gate valve as described above, preferably, the number of the locking columns is plural, the valve plate is provided with a plurality of the first locking holes, and the slider is provided with a plurality of the second locking holes; each locking column penetrates through one first locking hole and one second locking hole.

In the gate valve, preferably, the locking device includes a stopping post and a locking spring, the slider is provided with a sliding hole, the stopping post is inserted into the sliding hole, and two ends of the locking spring are respectively connected to the stopping post and the bottom of the sliding hole; a groove is formed in the side wall of the sliding groove; the locking spring is used for abutting against the stopping column so as to drive the stopping column to extend into the groove.

In the gate valve as described above, preferably, the stopper post and the locking spring are provided in plural numbers, and each of the locking spring and the stopper post is inserted into one of the sliding holes.

The gate valve as described above preferably further includes a valve cover and a driving device, the valve cover covers the outside of the telescopic hole, the valve cover is provided with a shaft hole, the valve rod is arranged in the shaft hole in a penetrating manner, and the top end of the valve rod is in transmission connection with the driving device.

the gate valve as described above, preferably, the driving device includes a driving wheel, the driving wheel and the valve rod are coaxially disposed, a driving threaded hole is disposed on the driving wheel, a driving external thread matched with the driving threaded hole is disposed on the valve rod, and the driving wheel is rotatably connected to the valve cover.

In the gate valve described above, a seal ring is preferably provided between the valve cover and the valve body.

The invention provides a gate valve, wherein a valve cavity is arranged in a valve body, and an inlet and an outlet are respectively formed at two ends of the valve cavity; the side wall of the valve body is provided with a telescopic hole, the valve plate extends into the valve cavity from the telescopic hole, the side wall of the valve cavity is provided with an inserting groove, the valve plate is inserted into the inserting groove, the bottom of the inserting groove is provided with a guide rail, the valve plate is provided with a guide groove matched with the guide rail, the valve plate is provided with a sliding groove, the valve rod is provided with a sliding block, the sliding block is arranged in the sliding groove in a sliding manner, and the locking device is arranged on the valve; when the guide rail is corroded by impurities in oil gas and falls off, the valve plate rocks in the slot, and the locking device can prevent the sliding block from moving to the outside of the sliding groove, so that the sliding block is prevented from being separated from the sliding groove, and the valve plate is prevented from being separated from the valve rod.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gate valve in the prior art;

FIG. 2 is a schematic structural diagram of a gate valve according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a schematic structural diagram of a gate valve according to another embodiment of the present invention;

Fig. 5 is a partially enlarged view of B in fig. 4.

Description of reference numerals:

10. A valve body;

101. A guide rail;

20. A valve plate;

201. a chute;

30. A valve stem;

301. A slider;

40. A locking post;

50. A stopper post;

60. A locking spring;

70. A valve cover;

701. A stop flange;

702. a bearing;

703. a connecting plate;

704. A filler;

80. And a driving wheel.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

FIG. 2 is a schematic structural diagram of a gate valve according to an embodiment of the present invention; FIG. 3 is an enlarged view of a portion of FIG. 2 at A; FIG. 4 is a schematic structural diagram of a gate valve according to another embodiment of the present invention; fig. 5 is a partially enlarged view of B in fig. 4.

please refer to fig. 2-5. The embodiment provides a gate valve, includes: a valve body 10, a valve plate 20, a valve rod 30, and a locking device; a valve cavity is arranged in the valve body 10, and an inlet and an outlet are respectively formed in the valve cavity at two ends of the valve body 10; a telescopic hole is formed in the side wall of the valve body 10, and the valve plate 20 extends into the valve cavity from the telescopic hole; the inner wall of the valve cavity is provided with a slot, and the valve plate 20 is inserted in the slot; a guide rail 101 is arranged at the bottom of the slot, and a guide groove matched with the guide rail 101 is arranged on the valve plate 20; the side surface of the valve plate 20 is internally provided with a sliding groove 201, the bottom end of the valve rod 30 is provided with a sliding block 301, and the sliding block 301 is arranged in the sliding groove 201 in a sliding manner; a locking device is provided on the valve plate 20 for preventing the slider 301 from moving to the outside of the chute 201.

specifically, the valve body 10 may be in a cylindrical shape with a cross section in a shape of a circle, a rectangle, a triangle, or the like, or the valve body 10 may be in other irregular shapes; a valve cavity is formed by extending one end of the valve body 10 to the other end, an inlet and an outlet are formed at two ends of the valve cavity, a connecting part is arranged on the side wall of the valve body 10, a telescopic hole is formed in the connecting part, and the telescopic hole penetrates through the valve cavity; the valve plate 20 and the valve rod 30 extend into the valve cavity from the telescopic hole.

for convenience of description, taking the valve body 10 as an example in a cylindrical shape, correspondingly, the inlet and the outlet are respectively openings formed at two ends of the valve cavity, the inlet pipe is communicated with the inlet, the outlet pipe is communicated with the outlet, the inlet pipe is communicated with the process upstream flow, and the outlet pipe is communicated with the process downstream flow. The valve body 10 may be mainly made of metal material such as copper, iron, aluminum, or the like, or the valve body 10 may be mainly made of non-metal material such as plastic. The valve cavity is internally provided with a slot matched with the valve plate 20, and when the valve plate 20 is driven to move towards the valve cavity, the valve plate 20 is inserted in the slot so as to seal the valve cavity and prevent oil gas from flowing from the inlet to the outlet.

Preferably, a first connection flange and a second connection flange are respectively formed at two ends of the valve body 10, the first connection flange is provided with a first connection hole, and the second connection flange is provided with a second connection hole; a first assembling flange is formed on the outer side of the inlet pipe, a third connecting hole is formed in the first assembling flange, and a first fastening bolt is respectively arranged in the first connecting hole and the third connecting hole in a penetrating manner so as to connect the first connecting flange and the first assembling flange together and further realize the communication between the inlet pipe and the inlet; the outside of outlet pipe is formed with the second assembly flange, has seted up the fourth connecting hole on the second assembly flange, and second fastening bolt wears to establish respectively in second connecting hole and fourth connecting hole to realize being connected between second connecting flange and the second assembly flange, in order to realize the intercommunication between export and the outlet pipe.

further preferably, a first sealing ring is clamped between the first connecting flange and the first assembling flange to enhance the sealing property between the first connecting flange and the first assembling flange, so that crude oil or natural gas is prevented from flowing out from between the first connecting flange and the first assembling flange. And a second sealing ring is clamped between the second connecting flange and the second assembling flange to enhance the sealing property between the second connecting flange and the second assembling flange so as to prevent crude oil or natural gas from flowing out from the space between the second connecting flange and the second assembling flange. The first sealing ring and the second sealing ring may be both rubber rings, and certainly, the first sealing ring and the second sealing ring may also be both metal rings.

specifically, the gate valve further comprises a valve cover 70 and a driving device, the valve cover 70 covers the outer side of the telescopic hole, a shaft hole is formed in the valve cover 70, the valve rod 30 penetrates through the shaft hole, and the top end of the valve rod 30 is in transmission connection with the driving device. The valve cover 70 can seal the telescopic hole to prevent the oil gas in the valve cavity from flowing out to the outside through the telescopic hole.

The top end of the valve cover 70 extends upward to form a connecting plate 703, the top end of the connecting plate 703 forms a mounting part, the shaft hole is arranged on the mounting part, and the shaft hole is provided with a stop flange 701 towards the bottom end of the valve cavity; a bearing 702 is arranged in the shaft hole, the valve rod 30 is arranged in an inner ring of the bearing 702 in a penetrating mode, an outer ring of the bearing 702 is connected with the side wall of the shaft hole, and the bearing 702 is located on the upper portion of the stop flange 701. The valve cover 70 is also provided with a stuffing box, the central line of the stuffing box and the central line of the shaft hole are arranged in a collinear way, and the stuffing box is communicated with the valve cavity; the valve stem 30 is inserted into the valve chamber through the stuffing box, which may be filled with a stuffing 704 in order to avoid oil and gas from flowing out of the valve chamber.

Preferably, a sealing ring is disposed between the bonnet 70 and the valve body 10. So as to improve the sealing performance between the valve cover 70 and the valve body 10 and prevent oil gas from flowing out from between the valve cover 70 and the valve body 10.

further preferably, a first annular groove and a second annular groove are formed at the top end of the connection portion and the bottom end of the bonnet 70, respectively, and sealing rings are disposed in the first annular groove and the second annular groove, respectively, to further increase the contact area between the bonnet 70 and the connection portion and the sealing rings, and further improve the sealing performance between the bonnet 70 and the valve body 10. The sealing ring can be a rubber ring or a metal ring.

Preferably, the driving means in this embodiment may be various as long as it can drive the valve rod 30 to move up and down; for example: the driving device may include a driving cylinder, a cylinder body of the driving cylinder is connected to the valve cover 70, a piston rod of the driving cylinder is connected to the top end of the valve rod 30, the driving cylinder can drive the valve rod 30 to move into the valve cavity when the piston rod extends out of the cylinder body, and the valve rod 30 moves to the outside of the valve cavity when the piston rod retracts into the cylinder body.

Preferably, in this embodiment, the driving means comprises a driving wheel 80, the driving wheel 80 being arranged coaxially with the valve stem 30; the driving wheel 80 is provided with a driving threaded hole, the valve rod 30 is provided with a driving external thread matched with the driving threaded hole, and the driving wheel 80 is rotatably connected with the mounting part on the valve cover 70. The valve rod 30 is driven to move up and down by twisting the driving wheel 80, and the operation is simple.

Preferably, the bearing 702 can be varied, as long as it is ensured that the bearing 702 can carry radial forces as well as certain axial forces, for example: when the mass and load of valve plate 20 are small, bearing 702 may be a deep groove ball bearing; when the mass and load of valve plate 20 are large, bearing 702 may be an angular contact ball bearing or a tapered roller bearing, etc. to bear a large axial force. In this embodiment, to ensure sufficient load capacity for the upward and downward movement of valve plate 20, bearing 702 is preferably a thrust bearing.

Specifically, the valve rod 30 includes a first section and a second section, which are coaxially disposed and integrally formed; the first section is positioned at the upper part of the stuffing box, and the tail end of the second section is provided with a sliding block; the drive external screw thread sets up on first section, drive external screw thread and drive screw hole cooperation to when twisting back drive wheel 80, can drive first section and second section and remove, and then drive valve plate 20 and remove.

Specifically, valve plate 20 may be a metal plate mainly made of metal materials such as copper, iron, and aluminum, or a non-metal plate mainly made of non-metals such as plastic and rubber, and valve plate 20 may be made of metal materials such as copper, iron, and aluminum. A slot is arranged on the side wall of the valve cavity opposite to the valve plate 20; for convenience of description, taking the valve cavity as an example, the valve cavity is cylindrical, the slot is an annular groove formed on the side wall of the valve cavity, and when the valve plate 20 extends into the valve cavity, the edge of the valve plate 20 is slidably arranged in the annular groove; guide rail 101 is disposed at the bottom of the annular groove, so that when valve plate 20 is slidably disposed in the slot, guide rail 101 penetrates the guide groove of valve plate 20 to prevent valve plate 20 from swaying in the slot.

Preferably, the guide rail 101 in this embodiment may have various types such as: the guide rail 101 may be a rubber plate attached to the bottom of the slot, or the guide rail 101 may be a plastic plate disposed on the bottom of the slot; of course, the guide rail 101 may be a protruding rib formed on the insertion groove, and in this case, the guide rail 101 is integrally formed with the valve body 10. In the present embodiment, the guide rail 101 is made of metal, and is made of the same material as the valve element 10.

Specifically, the sliding block 301 may be disposed at the bottom end of the valve rod 30 facing the valve plate 20, it should be noted that a notch communicated with the chute 201 is formed on the valve plate 20, so that when the sliding block 301 is slidably disposed in the chute 201, the valve rod 30 is slidably disposed in the notch; the sliding block 301 may be cylindrical, prismatic, or the like, and the sliding block 301 may also be spherical, ellipsoidal, or the like, but of course, the sliding block 301 may also be in other irregular shapes as long as it is ensured that the sliding block 301 can drive the valve plate 20 to move when the valve rod 30 moves.

Specifically, the sliding groove 201 may be disposed at the top end of the valve plate 20, at this time, the sliding groove 201 may be opened from the side surface of the valve plate 20 facing the inlet to the side surface facing the outlet, the sliding groove 201 vertically penetrates through the valve plate 20, and the sliding block 301 may slide into the sliding groove 201 from the openings at the two ends of the sliding groove 201.

specifically, the locking device in this embodiment may be various, as long as the locking device can prevent the sliding block 301 from moving to the outside of the sliding slot 201, so as to prevent the sliding block 301 from sliding out of the sliding slot 201, and further to separate the valve rod 30 from the valve plate 20; for example: the locking device can comprise a locking plate, a stop groove is formed in the valve plate 20 and communicated with the sliding groove 201, the locking plate is arranged in the stop groove in a penetrating mode, and the sliding block 301 can be prevented from moving to the outer side of the sliding groove 201 by the locking plate; preferably, two stop grooves are formed in the valve plate 20 at intervals, a locking plate is inserted into each stop groove, and the two locking plates clamp the slider 301 inside the sliding slot 201 to prevent the slider 301 from moving to the openings at the two ends of the sliding slot 201. Or the locking device comprises a stop bolt, a bolt hole penetrating to the sliding chute 201 is formed in the valve plate 20, the stop bolt is screwed into the bolt hole, the tail end of the stop bolt abuts against the sliding block 301, and the sliding block 301 is prevented from moving outwards from the sliding chute 201 through the friction force between the stop bolt and the sliding block 301; or the stop bolt is located on the side of the slider 301 facing the opening, where the stop bolt can prevent the slider 301 from moving towards the opening.

The installation process of the gate valve that this embodiment provided does: firstly, a sliding block 301 on a valve rod 30 is arranged in a sliding groove 201 on a valve plate 20 in a sliding mode, and a locking device is enabled to lock the sliding block 301; the valve plate 20 is inserted into the slot on the inner wall of the valve cavity through the telescopic hole, and meanwhile, the guide rail 101 is arranged in the guide groove on the valve plate 20 in a sliding manner; the valve cover 70 is covered on the side wall of the valve body 10 to seal the telescopic hole, and the valve cover 70 is connected with the valve body 10; filling stuffing 704 in the stuffing box to seal the stuffing box; then, a bearing 702 is provided in the shaft hole, and the drive pulley 80 is mounted on the tip end of the valve stem 30 with the lower portion of the drive pulley 80 abutting against the bearing 702.

When the valve is used, the driving wheel 80 is twisted towards a preset direction, so that the valve rod 30 drives the valve plate 20 to move upwards, oil gas at an inlet can flow to an outlet, and the opening of the gate valve is realized; the driving wheel 80 is twisted in the opposite direction of the preset direction, so that the valve plate 20 is driven to move towards the valve cavity, and the valve plate 20 is inserted into the slot to prevent oil gas from flowing from the inlet to the outlet, so that the gate valve is closed. When impurities in oil gas corrode the guide rail 101 and further part of the guide rail 101 falls off, the valve plate 20 shakes in the slot, and the locking device can prevent the sliding block 301 from moving to the outside of the sliding groove 201 so as to prevent the sliding block 301 from being separated from the sliding groove 201.

according to the gate valve provided by the embodiment, the valve cavity is arranged in the valve body 10, and the valve cavity forms an inlet and an outlet at two ends of the valve body 10 respectively; a telescopic hole is formed in the side wall of the valve body 10, the valve plate 20 extends into the valve cavity through the telescopic hole, an insertion groove is formed in the side wall of the valve cavity, the valve plate 20 is inserted into the insertion groove, a guide rail 101 is arranged at the bottom of the insertion groove, a guide groove matched with the guide rail 101 is formed in the valve plate 20, a sliding groove 201 is formed in the valve plate 20, a sliding block 301 is arranged on the valve rod 30, the sliding block 301 is arranged in the sliding groove 201 in a sliding mode, and the locking device is arranged on the valve plate; when the guide rail 101 is corroded by impurities in oil gas and falls off, the valve plate 20 rocks in the slot, and the locking device can prevent the sliding block 301 from moving to the outside of the sliding groove 201, so that the sliding block 301 is prevented from being separated from the sliding groove 201.

With continued reference to fig. 2 and 3. Specifically, the locking device comprises a locking column 40, a first locking hole is formed in the valve plate 20, a second locking hole is formed in the sliding block 301, and the locking column 40 penetrates through the first locking hole and the second locking hole. The sliding block 301 is prevented from moving outwards in the sliding groove 201 by the locking column 40, and locking is firm.

Preferably, the center line of the first locking hole may be arranged parallel to the axis of the valve rod 30, or the center line of the first locking hole may be arranged perpendicular to the axis of the valve rod 30, and of course, the center line of the first locking hole may also be arranged at an angle to the axis of the valve rod 30.

Specifically, a first internal thread is provided on the inner wall of the first locking hole, and a first external thread matched with the first internal thread is provided on the locking post 40. The first internal thread is matched with the first external thread, so that the locking column 40 can be prevented from moving to the outside of the first locking hole, and the locking column 40 is prevented from falling from the first locking hole and the second locking hole.

Specifically, the end of locking post 40 is provided with the rotating part, wears to establish the front end of locking post 40 in first locking hole after, twists reverse locking post 40 through the rotating part to make first external screw thread and first interior screw-thread fit, easy to assemble.

Preferably, the rotating part may be a rotating rod disposed at the end of the locking post 40, the center line of the rotating rod is perpendicular to the center line of the locking post 40, and the locking post 40 can be driven to rotate by pulling the rotating rod; or the rotating part is a rotating column with a regular hexagon cross section formed at the tail end of the locking column 40, and can be matched with the rotating column through a wrench during installation.

Preferably, a third inserting hole is formed in a side wall of the sliding groove 201 opposite to the side wall where the first locking hole is formed, after the locking column 40 is inserted into the first locking hole and the second locking hole, the front end of the locking column 40 is inserted into the third inserting hole, so that the sliding block 301 is further prevented from moving outwards in the sliding groove 201. Further preferably, the third inserting hole is a threaded hole, and the first external thread on the locking column 40 is matched with the threaded hole.

Specifically, a second internal thread is provided on the inner wall of the second locking hole, and a second external thread matched with the second internal thread is provided on the locking column 40. After the locking column 40 is broken, the broken locking column 40 can be directly taken out from the first locking hole, and only the valve rod 30 needs to be replaced; so as to avoid the waste of material caused by the need of replacing the valve rod 30 and the valve plate 20 due to the difficulty in taking out the locking column 40 due to the fracture in the first locking hole.

specifically, the number of the locking columns 40 is multiple, the valve plate 20 is provided with a plurality of first locking holes, and the slide block 301 is provided with a plurality of second locking holes; each locking post 40 is disposed through one of the first and second locking holes. The plurality of locking posts 40 may increase the strength of the locking device. Preferably, when there are two locking posts 40, the two locking posts 40 may be disposed at both sides of the valve stem 30, respectively; of course, the locking posts 40 could be three, four, etc.

with continued reference to fig. 4 and 5. Specifically, the locking device comprises a stop column 50 and a locking spring 60, a sliding hole is formed in the sliding block 301, the stop column 50 penetrates through the sliding hole, and two ends of the locking spring 60 are respectively connected with the stop column 50 and the bottom of the sliding hole; a groove is arranged on the side wall of the sliding chute 201; the locking spring 60 is used to abut the stopper post 50 to drive the stopper post 50 into the recess. In the process of slidably arranging the sliding block 301 in the sliding groove 201, the stop column 50 can be automatically slidably arranged in the groove under the driving of the locking spring 60, so that the sliding block 301 is locked, and the locking device is convenient to install and simple in structure.

Preferably, the stopping post 50 and the locking spring 60 are provided in plurality, and each of the locking spring 60 and the stopping post 50 is inserted into one of the sliding holes. The plurality of stopper posts 50 are simultaneously inserted into the grooves of the slide groove 201, so that the strength of the locking device can be improved. Preferably, a plurality of stop posts 50 respectively project from two planes of the slider 301 that are symmetrical parallel to the axis of the valve rod 30, and grooves are respectively provided on two corresponding planes of the slide groove that are symmetrical parallel to the axis of the valve rod 30, so as to further enhance the stability of the slider 301.

Preferably, there may be one groove on the side wall of the sliding chute 201, and at this time, each stop column 50 is inserted into the same groove; or a plurality of grooves are formed in the side wall of the sliding groove 201, each groove corresponds to one sliding hole, and correspondingly, each stop post 50 penetrates through the corresponding groove.

Taking the example where the stopper post 50 is cylindrical, the centerline of the stopper post 50 may be perpendicular to the side wall of the chute, or the centerline of the stopper post 50 may be parallel to the side wall of the chute. Of course, the stop pillar 50 may also be a prism having a regular shape such as a rectangle or a triangle, and the cross section of the stop pillar 50 may also be other irregular shapes.

In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.