A new type of track-type hard-sealed plug valve

Abstract

The present invention relates to the field of valves, and specifically to a new type of track-type hard-sealed plug valve, which comprises a lower valve body and a valve cover upper valve body. A valve head is arranged in the lower valve body and a valve stem is arranged on the valve head. A guide sleeve with a guide groove is arranged on the valve stem. A guide assembly with a guide pin and a positioning sleeve is arranged on the side wall of the upper valve body. The positioning sleeve is threadedly installed in a mounting opening on the side wall of the upper valve body. The guide pin is detachably installed in the positioning sleeve. An adjusting mechanism with a reference handle is arranged on the valve stem. The present invention is provided with two groups of guide pins and the guide pins and the valve body are detachably installed in two stages through the positioning sleeve. When the guide pin is damaged, the first spring can be driven to pop out by pulling out the limit frame, or the guide pin can be rotated to be removed together with the positioning sleeve, thereby preventing the damaged guide pin from continuing to affect the movement of the guide sleeve and the valve stem, and allowing the reference handle to contact the side wall of the operating port to assist the remaining guide pins to bear force, so that the valve stem can operate more stably.

Description

Technical Field

[0001] The invention relates to the field of valves, in particular to a track-type hard-sealed new type cock valve. Background Art

[0002] The plug valve is opened or closed by rotating 90 degrees to connect or separate the port on the valve head with the fluid channel on the valve body. The hard-sealed plug valve is a type of plug valve. Its characteristic is that it uses hard materials such as metal as seals. Through precise processing and heat treatment processes, it ensures that the sealing surface has extremely high hardness to contact and seal with the fluid channel in the valve body. This also makes the hard-sealed plug valve usually adopt a track structure. A guide sleeve with a guide groove is provided on the valve stem. The guide pin fixed on the valve body cooperates with the guide groove to guide the valve head to rise first and then rotate to open or rotate first and then descend to close when opening and closing the valve head, thereby reducing the friction between the contact surface of the valve head and the fluid channel.

[0003] The existing guide pin is in direct contact with the guide groove in the valve body. The guide sleeve is subjected to force as an integral block structure, while the guide pin is subjected to a force perpendicular to the length direction of the structure. Therefore, the guide pin is more susceptible to damage during use. This causes the guide pin to be subjected to force quickly and break in an emergency situation where the valve needs to be closed. This can lead to guide failure, broken objects pressing against the upper wall of the guide groove, and other situations that affect the control of the valve stem, making it impossible to close the valve head and, in an emergency, unable to block the fluid. Summary of the invention

[0004] In view of the above problems, the present invention provides a new type of track-type hard-sealed plug valve, whose structure includes a lower valve body, a valve cover installed on the lower valve body and an upper valve body installed on the valve cover, the lower valve body is provided with a valve head and the valve head extends into the upper valve body to provide a valve stem, the upper valve body is provided with a threaded sleeve that is threadedly engaged with the valve stem, wherein a guide sleeve is provided on the valve stem, a guide groove is provided on the side of the guide sleeve, a guide assembly is provided on the side wall of the upper valve body, and an adjusting mechanism is installed on the valve stem; the guide assembly is detachably installed on the side wall of the upper valve body, the guide assembly includes a guide pin, and the guide pin is engaged with the guide groove on the guide sleeve on the side wall of the upper valve body The guide groove includes a vertical groove for guiding the valve stem to move vertically, and a spiral ring groove connected to the bottom end of the vertical groove for guiding the valve stem to rotate; the adjusting mechanism includes a reference handle mounted on the valve stem, the reference handle moves with the valve stem, an operating port is provided on the side wall of the upper valve body, and the reference handle extends out of the operating port; the guide assembly also includes a positioning sleeve and a first spring, an installation port extending outward is provided on the side wall of the upper valve body, the positioning sleeve is installed in the installation port by threads, the guide pin is detachably installed in the positioning sleeve, and the first spring is arranged between the guide pin and the positioning sleeve to provide an elastic force in the direction of the outer side of the upper valve body to the disassembled guide pin.

[0005] Furthermore, an outer baffle portion with a diameter larger than that of the mounting port is provided on the outer side of the guide pin, the first spring is arranged between the positioning sleeve and the outer baffle portion of the guide pin, and an annular flange is provided on the outer side of the mounting port; a limiting frame is nested on the mounting port to limit the freedom of the guide pin in the axial direction, and the guide pin is detachably installed in the positioning sleeve through the limiting frame.

[0006] Furthermore, the limit frame includes a middle section plate portion in the middle and side buckle plate portions extending from the middle section plate portion to both sides, the ends of the side buckle plate portions are buckled, the middle section plate portion abuts against the guide pin and the side buckle plate portions are buckled with the flange of the mounting port.

[0007] Furthermore, the inner wall of the positioning sleeve is provided with a multi-plane surrounding polyhedral groove, the guide pin is provided with a contoured portion and engages with the polyhedral groove, and the guide pin limits its own freedom of rotation around the axis in the polyhedral groove through the contoured portion; the outer side of the guide pin is provided with an operating portion for a tool to apply force to the guide pin.

[0008] Furthermore, the valve head is provided with a transverse through-hole, and the lower valve body is provided with a fluid channel. The matching states of the valve head and the lower valve body include a connected state and a closed state. In the connected state, the through-hole is connected with the fluid channel, and in the closed state, the unopened area on the side of the valve head blocks the fluid channel; the reference handle extends from the valve stem and the extending direction is parallel to the direction of the through-hole. The reference handle is on the same vertical straight line as the bottom end of the spiral ring groove in the vertical direction. When the reference handle abuts against the left side of the operating port, the valve head is in a position where the unopened area on the side blocks the fluid channel.

[0009] Furthermore, the guide rail sleeve is divided into a sleeve seat located at the bottom and a movable sleeve block located at the top by a guide groove, the sleeve seat is fixedly mounted on the valve stem, the movable sleeve block is movably nested in the sleeve seat and the valve stem, and a second spring is provided between the movable sleeve block and the sleeve seat to provide an upward elastic force for the movable sleeve block; an inner adjustment sleeve is also provided on the valve stem, the inner adjustment sleeve limits the freedom of the movable sleeve block in the vertical direction to drive the movable sleeve block to engage with the sleeve seat, and the operating port covers the side of the inner adjustment sleeve to open the inner adjustment sleeve to release the vertical restriction of the movable sleeve block.

[0010] Furthermore, the state in which the valve head is driven by the valve stem to move in the lower valve body includes an ascending rotation state and a rotating descending state. The valve head reaches a connected state after the ascending rotation state, and reaches a closed state after the rotating descending state; the threaded sleeve drives the valve stem to move downward so that the valve stem enters a rotating descending state, and the top surface, left side surface and top surface of the vertical groove on the inner adjusting sleeve in the rotating descending state are against the guide pin, and the top surface, left side surface and top surface of the vertical groove are located on the movable sleeve block.

[0011] Furthermore, the valve stem is provided with a limiting convex ring with a diameter larger than the valve stem, and the inner adjustment sleeve is nested and installed on the limiting convex ring and the freedom of upward movement is limited by the limiting convex ring; a limiting block is extended downward from the bottom end of the inner adjustment sleeve, and the inner adjustment sleeve is abutted against the movable sleeve block below through the limiting block between the limiting convex ring and the movable sleeve block, and the side of the limiting block has a vacant area and the length of the vacant area is greater than the width of the movable sleeve block, which is used for the movable sleeve block to move upward; the inner adjustment sleeve is provided with an adjustment handle extending to the outside of the operating port, and the adjustment handle is detachably fixedly connected to the reference handle through a connecting piece, and in this connection state, the limiting block abuts against the top of the movable sleeve block.

[0012] Furthermore, the guide rail sleeve is provided with two groups of guide grooves, the inner adjustment sleeve is provided with two movable sleeve blocks to open the two guide grooves, and the bottom end of the inner adjustment sleeve is provided with two limit blocks to limit the two movable sleeve blocks respectively; the distance between the limit blocks is a vacant area, and the movable sleeve blocks in the vacant area limit the freedom of rotation of the limit blocks and the inner adjustment sleeve around the axial direction.

[0013] Furthermore, the width of the operating opening is greater than the width of the movable sleeve block, and after the inner adjustment sleeve is rotated, the adjustment handle and the reference handle are mutually expanded, and the reference handle is located at the left side wall of the operating opening and the adjustment handle is located at the right side wall of the operating opening.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention is provided with two groups of guide pins, and the guide pins and the valve body are detachably installed in two stages through the positioning sleeve. When the guide pin is cracked and damaged, the first spring can be driven to pop out by pulling out the limit frame. When the guide pin is deformed and expanded so that the guide pin cannot be disengaged from the positioning sleeve, the positioning sleeve can be driven to rotate by the guide pin, and the positioning sleeve can be disassembled together with the positioning sleeve. Since the diameter of the positioning sleeve is larger than the guide pin, most of the deformed structural width of the guide pin can pass through the installation opening, thereby avoiding the situation that the guide pin cannot be disengaged due to cracking and expansion of the guide pin end and deformation and expansion, and further avoiding the situation that the damaged guide pin continues to affect the movement of the guide rail sleeve and the valve stem in the valve body.

[0016] The present invention provides a reference handle on the valve stem. Under normal conditions, there is a slight gap between the reference handle and the side wall of the operating port to avoid stress on the reference handle during normal use. When the valve stem becomes unstable due to the remaining guide pins temporarily bearing the load alone, the reference handle contacts the side wall of the operating port to assist the remaining guide pins in bearing the force, thereby allowing the valve stem to operate more stably.

[0017] Furthermore, the present invention also splits the guide rail sleeve into a fixed sleeve seat at the bottom and a movable sleeve block at the top through the guide groove, and uses the inner adjusting sleeve to offset the movable sleeve block to maintain the stability of the basic function. When the guide rail sleeve is stuck with the inner wall of the upper valve body due to the fragments of the guide pin, the inner adjusting sleeve is driven to rotate by the adjusting handle to release the restriction on the top of the movable sleeve block, so that the movable sleeve block is driven by the second spring to rise a certain distance upward, thereby rubbing off the fragment of the guide pin stuck between the top of the guide groove and the inner wall of the upper valve body, so that the valve stem can move downward better. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial cutaway schematic diagram of the three-dimensional structure of a new type of track-type hard-sealed plug valve of the present invention.

[0019] Figure 2 The diagram is a front cross-sectional structural diagram of a new type of track-type hard-sealed plug valve of the present invention.

[0020] Figure 3 It is a top view cutaway schematic diagram of the cooperation between the guide assembly and the guide rail sleeve of the present invention.

[0021] Figure 4 It is a partial cutaway schematic diagram of the three-dimensional structure of the guide assembly and the guide rail sleeve of the present invention.

[0022] Figure 5 It is a three-dimensional schematic diagram of the valve head of the present invention in a connected state.

[0023] Figure 6 It is a schematic diagram of the three-dimensional structure of the guide rail sleeve and the adjustment mechanism of the present invention.

[0024] Figure 7 It is a schematic diagram of the working state of the regulating mechanism of the present invention.

[0025] In the figure: 1. Lower valve body; 2. Valve cover; 3. Valve stem; 4. Valve head; 5. Upper valve body; 6. Threaded sleeve; 7. Hand wheel;

[0026] 1a, fluid channel; 21, pressure ring; 22, packing; 3a, limit convex ring; 3b, bite ring; 31, guide rail sleeve; 32, adjustment mechanism; 4a, through port; 5a, installation port; 5b, operation port; 51, guide assembly; 52, limit frame;

[0027] 31a, vertical groove; 31b, spiral ring groove; 311, sleeve seat; 312, movable sleeve block; 313, second spring; 321, inner adjustment sleeve; 322, limit block; 323, adjustment handle; 324, reference handle; 325, bite sleeve; 326, connecting piece; 511, guide pin; 512, positioning sleeve; 513, first spring; 52a, middle section plate; 52b, side buckle plate; 52c, limit section;

[0028] 511a, outer baffle portion; 511b, contour portion; 511c, operating portion; 512a, polyhedral groove. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Examples, such as Figure 1-Figure 7 As shown: The present invention provides a new type of track-type hard-sealed plug valve, which comprises a lower valve body 1, a valve cover 2 mounted on the lower valve body 1, and an upper valve body 5 mounted on the valve cover 2. The lower valve body 1, the valve cover 2, and the upper valve body 5 are sequentially mounted to form an integral outer shell of the valve. A valve head 4 is arranged in the lower valve body 1, and the valve head 4 extends into the upper valve body 5 and is provided with a valve stem 3. The valve head 4 is conical to match the fluid channel 1a in the lower valve body 1. A threaded section is arranged at the top of the upper valve stem 3. A threaded sleeve 6 is rotatably arranged in the upper valve body 5 and is connected to the valve stem. 3 is threadedly engaged, a hand wheel 7 is provided on the outer side of the upper valve body 5 and connected with the threaded sleeve 6 to control the rotation of the threaded sleeve 6, a guide rail sleeve 31 is provided on the valve stem 3, a guide groove is provided on the side of the guide rail sleeve 31, a guide assembly 51 with a guide pin 511 is provided on the side wall of the upper valve body 5, the guide pin 511 extends into the upper valve body 5 and engages with the guide groove on the guide rail sleeve 31, the guide groove includes a vertical groove 31a for guiding the valve stem 3 to move vertically, and a spiral ring groove 31b connected to the bottom end of the vertical groove 31a for guiding the valve stem 3 to rotate;

[0031] A pair of pressing rings 21 are provided in the lower valve body 1, and the valve stem 3 passes through the pressing rings 21 upwards. A packing 22 is provided between the pressing rings 21. The materials of the packing 22 are commonly graphite, polytetrafluoroethylene, fluororubber, nitrile rubber, silicone rubber, fiber, metal, etc. The packing 22 is accumulated between the pressing rings 21 and between the lower valve body 1 and the valve stem 3, and plays the role of sealing and stabilizing the valve stem 3;

[0032] The valve head 4 is provided with a through-port 4a which runs transversely therethrough, and the lower valve body 1 is provided with a fluid passage 1a. The matching states of the valve head 4 and the lower valve body 1 include a connected state and a closed state. In the connected state, the through-port 4a is connected to the fluid passage 1a, and in the closed state, the unopened area on the side of the valve head 4 blocks the fluid passage 1a, and the valve head 4 will first move away from the fluid passage 1a of the lower valve body 1 before rotating. Therefore, the states in which the valve head 4 moves in the lower valve body 1 driven by the valve stem 3 include an ascending rotation state and a rotating descending state. The valve head 4 reaches a connected state after the ascending rotation state, and reaches a closed state after the rotating descending state.

[0033] When the threaded sleeve 6 is rotated, the thread drives the valve stem 3 to rise or fall, and the rotation tendency of the valve stem 3 itself after being driven is limited by the vertical groove 31a and the guide pin 511, and can only move vertically within the range of the vertical groove 31a, while the rotation tendency of the valve stem 3 itself after being driven is released and rotated through the spiral ring groove 31b; when the valve stem 3 moves upward vertically, starting from the junction of the bottom of the vertical groove 31a and the spiral ring groove 31b, the rotation tendency of the valve stem 3 itself after being driven will cause the valve stem 3 to rotate in the spiral ring groove 31b, thereby rotating the valve head 4, that is, the threaded sleeve 6 drives the valve stem 3 to move upward so that the valve stem 3 enters an ascending rotation state; when the valve stem 3 moves downward vertically, the valve stem 3 and the valve head 4 rotate first starting from the spiral ring groove 31b, and then the vertical movement is limited in the vertical groove 31a, so that the valve head 4 descends, that is, the threaded sleeve 6 drives the valve stem 3 to move downward so that the valve stem 3 enters a rotating descending state.

[0034] In case the guide pin 511 breaks during use, resulting in guide failure, or the broken objects press against the upper wall of the guide groove, which affects the control of the valve stem 3, in order to enable the valve head 4 to be closed in time to block the fluid, in this embodiment, the setting is made based on the guide assembly 51 and the adjustment mechanism 32 provided on the valve stem 3.

[0035] As for the guide assembly 51, in this embodiment, the guide assembly 51 is detachably mounted on the side wall of the upper valve body 5, and the guide assembly 51 also includes a positioning sleeve 512 and a first spring 513. The side wall of the upper valve body 5 is provided with an installation opening 5a extending outward, and the positioning sleeve 512 is installed in the installation opening 5a by threading. The guide pin 511 is detachably mounted in the positioning sleeve 512, and the first spring 513 is arranged between the guide pin 511 and the positioning sleeve 512 to provide upward movement for the disassembled guide pin 511 The outer side of the guide pin 511 is provided with an outer baffle portion 511a having a diameter larger than the mounting opening 5a. The first spring 513 is specifically provided between the positioning sleeve 512 and the outer baffle portion 511a of the guide pin 511. The outer side of the mounting opening 5a is provided with an annular flange. By utilizing the flange, a limiting frame 52 is nested on the mounting opening 5a to limit the freedom of the guide pin 511 in the axial direction. The guide pin 511 is detachably mounted in the positioning sleeve 512 through the limiting frame 52.

[0036] The limiting frame 52 comprises a middle section plate portion 52a in the middle and side buckle plate portions 52b extending from the middle section plate portion 52a to both sides, the ends of the side buckle plate portions 52b are buckle-shaped, and the middle section plate portion 52a is also provided with a limiting section 52c that bends and swings inwards in the front and rear opening areas of the limiting frame 52, so that the limiting section 52c plays a certain role in preventing meaningless falling off in the disassembly direction; the middle section plate portion 52a abuts against the guide pin 511 and the side buckle plate portion 52b is buckled with the flange of the installation opening 5a, so as to cooperate with the outward elastic force of the first spring 513 to tighten, and when the guide pin 511 breaks and the valve stem 3 loses the guide restriction, the limiting frame 52 is opened, and the first spring 513 drives the remaining part of the guide pin 511 to pop out;

[0037] Moreover, the inner wall of the positioning sleeve 512 is provided with a multi-plane surrounding polyhedral groove 512a, and a hexagonal groove is used in this embodiment. The guide pin 511 is provided with a profiling portion 511b and is engaged with the polyhedral groove 512a. The guide pin 511 is limited in its freedom of rotation around the axis in the polyhedral groove 512a by the profiling portion 511b. The outer side of the matching guide pin 511 is provided with an operating portion 511c for a tool to apply force to the guide pin 511. In this embodiment, a hexagonal bolt head is used. When the end of the guide pin 511 is deformed and cannot be ejected, the hexagonal bolt head type operating portion 511c is rotated to rotate the guide pin 511. The guide pin 511 cooperates with the polyhedral groove 512a through the profiling portion 511b, thereby driving the positioning sleeve 512 to rotate and disengage from the threaded cooperation with the installation port 5a, thereby avoiding the situation where the guide pin 511 cannot be disengaged due to the collapse and expansion of the end of the guide pin 511 and the deformation and expansion.

[0038] In coordination with this, in this embodiment, two groups of guide grooves are provided on the guide rail sleeve 31, and two groups of guide assemblies 51 are correspondingly provided on the upper valve body 5 to cooperate with the guide grooves. After the damaged guide pin 511 is released from blocking the valve stem 3, the remaining guide pin 511 is used for guiding and positioning. However, the two groups of guide pins 511 are also subjected to force during normal use. After one guide pin 511 is damaged, the other guide pin 511 has to temporarily bear a larger load, making the operation of the valve stem 3 relatively unstable, which can easily lead to poor closing or damage to the second guide pin 511.

[0039] Therefore, in this embodiment, not only that, an adjustment component is provided in coordination therewith, the adjustment mechanism 32 includes a reference handle 324 mounted on the valve stem 3, a gear-shaped or spline-shaped bite ring 3b is provided on the valve stem 3, the reference handle 324 is installed on the bite sleeve 325, and the bite sleeve 325 is nested with the bite ring 3b, so that the reference handle 324 moves with the valve stem 3, and the reference handle 324 can also apply force to control the rotation of the valve stem 3, an operation port 5b is provided on the side wall of the upper valve body 5, and the reference handle 324 extends out of the operation port 5b, which is used to monitor the position state of the valve stem 3 and perform remedial maintenance operations on the valve stem 3, the reference handle 324 extends from the valve stem 3 and the extension direction is parallel to the direction of the through port 4a, and the reference handle 324 is on the same vertical straight line as the bottom end of the spiral ring groove 31b in the vertical direction, therefore, when the reference handle 324 abuts against the left side of the operation port 5b, the valve head 4 is in a position where the side unopened area blocks the fluid channel 1a;

[0040] Therefore, if only one guide pin 511 is provided and it is damaged, or if both guide pins 511 are damaged, the reference handle 324 can be abutted against the left side of the operating port 5b to act as a limiting guide. At this time, when the valve stem 3 is driven to move by the threaded sleeve 6, the valve stem 3 will directly move downward to allow the unopened area on the side of the valve head 4 to abut against the fluid channel 1a for blocking; and when two guide pins 511 are provided but only one is damaged, the reference handle 324 will cooperate with the remaining guide pin 511. Under normal conditions, there is a slight gap between the reference handle 324 and the side wall of the operating port 5b to avoid stress on the reference handle 324 during normal use. When the valve stem 3 temporarily bears the load alone due to the other guide pin 511, the valve stem 3 will tilt or shake to a certain extent. At this time, the reference handle 324 contacts the side wall of the operating port 5b to assist the remaining guide pin 511 in bearing the force, so that the valve stem 3 can operate more stably.

[0041] Moreover, for the adjustment component, the guide rail sleeve 31 is divided into a sleeve seat 311 located at the bottom and a movable sleeve block 312 located at the top through a guide groove. The sleeve seat 311 is fixedly mounted on the valve stem 3, and the movable sleeve block 312 is movably nested on the sleeve seat 311 and the valve stem 3. A second spring 313 is provided between the movable sleeve block 312 and the sleeve seat 311 to provide an upward elastic force for the movable sleeve block 312. In coordination therewith, an inner adjustment sleeve 321 is also provided on the valve stem 3. The inner adjustment sleeve 321 limits the freedom of the movable sleeve block 312 in the vertical direction and is used to drive the movable sleeve block 312 to engage with the sleeve seat 311. The inner adjustment sleeve 321 is provided with an adjustment handle 323 extending to the outside of the operating port 5b.

[0042] Specifically, the valve stem 3 is provided with a limiting convex ring 3a whose diameter is larger than that of the valve stem 3, the inner adjusting sleeve 321 is nested and installed on the limiting convex ring 3a and the freedom of upward movement is limited by the limiting convex ring 3a, and a limiting block 322 is extended downwardly from the bottom end of the inner adjusting sleeve 321, and the inner adjusting sleeve 321 is abutted against the movable sleeve block 312 below through the limiting block 322 between the limiting convex ring 3a and the movable sleeve block 312, and the side of the limiting block 322 has a vacant area and the length of the vacant area is greater than the width of the movable sleeve block 312, which is used for the movable sleeve block 312 to move upward, and since the guide rail sleeve 31 with two guide grooves is used in this embodiment, two movable sleeve blocks 312 are respectively provided on the inner adjusting sleeve 321 to open the two guide grooves, and two limiting blocks 322 are provided at the bottom end of the inner adjusting sleeve 321 to limit the two movable sleeve blocks 312 respectively, and further, the spacing between the limiting blocks 322 is the vacant area;

[0043] Moreover, the operation port 5b covers the side of the inner adjustment sleeve 321, and is used to open the inner adjustment sleeve 321 to release the vertical restriction of the movable sleeve block 312. The inner adjustment sleeve 321 is driven to rotate by the adjustment handle 323, so that the limit block 322 rotates around the valve stem 3, and the movable sleeve block 312 without restriction is driven by the second spring 313 to move upward into the empty area, and the area of ​​the guide groove is expanded upward, and the broken part of the guide pin 511 stuck between the upper part of the guide groove and the inner wall of the upper valve body 5 can fall off;

[0044] It should be noted that the top surface, left side surface and top surface of the vertical groove 31a and the spiral ring groove 31b on the inner adjustment sleeve 321 in the rotating descending state are against the guide pin 511, and the top surface, left side surface and top surface of the vertical groove 31a and the spiral ring groove 31b are arranged on the movable sleeve block 312, so that the force-bearing surface that contacts the guide pin 511 during the closing process of the valve can move upward, and the guide pin 511 fragments that are easily stuck in the upper gap during operation can fall off;

[0045] It should be noted that the movable sleeve block 312 in the empty area limits the freedom of the limit block 322 and the inner adjustment sleeve 321 to rotate around the axial direction. After the inner adjustment sleeve 321 rotates, the adjustment handle 323 and the reference handle 324 are in a state of being unfolded with each other. In this embodiment, the width of the operating port 5b is set to be greater than the width of the movable sleeve block 312, and the reference handle 324 is located at the left side wall of the operating port 5b and the adjustment handle 323 is located at the right side wall of the operating port 5b, thereby further assisting the remaining guide pin 511 to bear the force, so that the valve stem 3 can operate more stably.

[0046] Moreover, in the present embodiment, the adjusting handle 323 and the reference handle 324 are detachably fixedly connected via a connecting piece 326, and in this connection state, the limit block 322 is against the top of the movable sleeve block 312. In the present embodiment, the connecting piece 326 is a pin that vertically penetrates and connects the reference handle 324 and the adjusting handle 323.

[0047] In practical implementation, in most emergency situations, the valve needs to be closed in time. The user rotates the threaded sleeve 6 through the hand wheel 7, and the thread drives the valve stem 3 to descend. At this time, the guide pin 511 presses against the tail of the spiral ring groove 31b. The valve stem 3 and the valve head 4 rotate first from the spiral ring groove 31b, and then the vertical movement is restricted in the vertical groove 31a, so that the valve head 4 descends to block the fluid channel 1a. When the guide pin 511 breaks and cracks during the movement in the guide groove, the limit frame is opened. 52, the first spring 513 drives the remaining part of the guide pin 511 to pop out, and when the end of the guide pin 511 is deformed and cannot pop out, the guide pin 511 is rotated by rotating the hexagonal bolt head type operating part 511c, and the guide pin 511 cooperates with the multi-faceted groove 512a through the contoured part 511b to drive the positioning sleeve 512 to rotate and disengage from the threaded cooperation with the installation port 5a, thereby avoiding the situation that the guide pin 511 cannot be disengaged due to the collapse and expansion of the end of the guide pin 511 and the deformation and expansion;

[0048] When the guide pin 511 breaks and causes some fragments to be blocked between the guide groove of the guide sleeve 31 and the inner wall of the upper valve body 5, the guide sleeve 31 will get tighter and tighter with the fragments when following the valve stem 3 to descend, thereby affecting the movement of the valve stem 3. At this time, the pin connector 326 between the reference handle 324 and the adjusting handle 323 is released, and then the adjusting handle 323 drives the inner adjusting sleeve 321 to rotate, so that the limit block 322 rotates around the valve stem 3, allowing the movable sleeve block 312 without restriction to move upward into the empty area driven by the second spring 313, and expand the area of ​​the guide groove upward for a distance, so that the fragments of the guide pin 511 stuck upward between the upper part of the guide groove and the inner wall of the upper valve body 5 are rubbed off, so that the valve stem 3 can move downward better;

[0049] At this time, when both guide pins 511 are damaged, the hand wheel 7 is continuously rotated, and the rotation of the valve stem 3 driven by the threaded sleeve 6 will make the reference handle 324 on the valve stem 3 rotate to the left side of the operating port 5b, and the reference handle 324 will abut against the left side of the operating port 5b to act as a limit guide. At this time, when the valve stem 3 is driven to move by the threaded sleeve 6, the valve stem 3 will directly move downward, so that the unopened area on the side of the valve head 4 will abut against the fluid channel 1a to block it; and when only one of the two guide pins 511 is damaged, the reference handle 324 will In cooperation with the remaining guide pin 511, under normal conditions, there is a slight gap between the reference handle 324 and the side wall of the operating port 5b to prevent the reference handle 324 from being subjected to force during normal use. When the valve stem 3 is temporarily subjected to load alone due to the other guide pin 511, the valve stem 3 will tilt or shake to a certain extent. At this time, the reference handle 324 contacts the side wall of the operating port 5b to assist the remaining guide pin 511 to bear the force, making the valve stem 3 run more stably, driving the unopened area on the side of the valve head 4 to collide with the fluid channel 1a, thereby blocking it in an emergency.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A new type of track-type hard-sealed plug valve, which comprises a lower valve body, a valve cover mounted on the lower valve body and an upper valve body mounted on the valve cover, wherein a valve head is arranged in the lower valve body and a valve stem is extended from the valve head to the upper valve body, and a threaded sleeve is arranged in the upper valve body to be threadedly engaged with the valve stem, and is characterized in that: The valve stem is provided with a guide rail sleeve, the side of the guide rail sleeve is provided with a guide groove, the side wall of the upper valve body is provided with a guide assembly, and the valve stem is equipped with an adjustment mechanism; The guide assembly is detachably mounted on the side wall of the upper valve body, and the guide assembly includes a guide pin, which is engaged with a guide groove on the guide rail sleeve on the side wall of the upper valve body, and the guide groove includes a vertical groove for guiding the valve stem to move vertically, and a spiral ring groove connected to the bottom end of the vertical groove for guiding the valve stem to rotate; The regulating mechanism comprises a reference handle mounted on the valve stem, the reference handle moves along with the valve stem, an operating port is arranged on the side wall of the upper valve body, and the reference handle extends out of the operating port; The guide assembly further includes a positioning sleeve and a first spring. The side wall of the upper valve body is provided with an installation opening extending outward. The positioning sleeve is installed in the installation opening by means of threads. The guide pin is detachably installed in the positioning sleeve. The first spring is provided between the guide pin and the positioning sleeve to provide an elastic force to the disassembled guide pin in the direction of the outer side of the upper valve body. The guide rail sleeve is divided into a sleeve seat located at the bottom and a movable sleeve block located at the top by the guide groove, the sleeve seat is fixedly mounted on the valve stem, the movable sleeve block is movably nested on the sleeve seat and the valve stem, and a second spring is provided between the movable sleeve block and the sleeve seat to provide an upward elastic force for the movable sleeve block; The valve stem is also provided with an inner adjustment sleeve, which limits the freedom of the movable sleeve block in the vertical direction and is used to drive the movable sleeve block to engage with the sleeve seat. The operating port covers the side of the inner adjustment sleeve and is used to open the inner adjustment sleeve to release the vertical restriction of the movable sleeve block. The valve stem is provided with a limiting convex ring with a diameter larger than that of the valve stem, and the inner adjustment sleeve is nested and installed on the limiting convex ring and the freedom of upward movement is limited by the limiting convex ring; A limit block is provided at the bottom end of the inner adjustment sleeve extending downward, and the inner adjustment sleeve is abutted against the movable sleeve block below through the limit block between the limit convex ring and the movable sleeve block. The side of the limit block has a vacant area and the length of the vacant area is greater than the width of the movable sleeve block, which is used for the movable sleeve block to move upward.

2. A track-type hard-sealed new plug valve according to claim 1, characterized in that: An outer baffle portion having a diameter larger than that of the mounting opening is provided on the outer side of the guide pin, the first spring is provided between the positioning sleeve and the outer baffle portion of the guide pin, and an annular flange is provided on the outer side of the mounting opening; The limiting frame is nested on the installation opening to limit the freedom of the guide pin in the axial direction, and the guide pin is detachably installed in the positioning sleeve through the limiting frame.

3. A track-type hard-sealed new plug valve according to claim 2, characterized in that: The limit frame includes a middle section plate portion in the middle and side buckle plate portions extending from the middle section plate portion to both sides, the ends of the side buckle plate portions are buckled, the middle section plate portion abuts against the guide pin and the side buckle plate portions are buckled with the flange of the installation port.

4. A track-type hard-sealed new plug valve according to claim 2, characterized in that: The inner wall of the positioning sleeve is provided with a multi-plane surrounding polyhedral groove, the guide pin is provided with a profiling portion and is engaged with the polyhedral groove, and the guide pin limits its own freedom of rotation around the axis in the polyhedral groove through the profiling portion; An operating portion is provided on the outer side of the guide pin for a tool to apply force to the guide pin.

5. According to claim 1, a track-type hard-sealed new plug valve is characterized by: The valve head is provided with a through hole that runs horizontally therethrough, and the lower valve body is provided with a fluid passage. The matching state between the valve head and the lower valve body includes a connected state and a closed state. In the connected state, the through hole is connected to the fluid passage, and in the closed state, the unopened area on the side of the valve head blocks the fluid passage. The reference handle extends from the valve stem and the extending direction is parallel to the direction of the through port. The reference handle is on the same vertical straight line as the bottom end of the spiral ring groove in the vertical direction. When the reference handle abuts against the left side of the operating port, the valve head is in a position to block the fluid channel in the side unopened area.

6. A track-type hard-sealed new plug valve according to claim 1, characterized in that: The state in which the valve head moves in the lower valve body driven by the valve stem includes an ascending rotation state and a rotating descending state. The valve head reaches a connected state after the ascending rotation state, and reaches a closed state after the rotating descending state. The threaded sleeve drives the valve stem to move downward so that the valve stem enters a rotational descending state. The top surface, left side surface and top surface of the vertical groove on the inner adjustment sleeve in the rotational descending state are against the guide pin, and the top surface, left side surface and top surface of the vertical groove are located on the movable sleeve block.

7. A track-type hard-sealed new plug valve according to claim 1, characterized in that: The inner adjustment sleeve is provided with an adjustment handle extending toward the outside of the operation port, the adjustment handle is detachably fixedly connected to the reference handle via a connecting piece, and in this connection state, the limit block abuts against the top of the movable sleeve block.

8. A track-type hard-sealed new plug valve according to claim 7, characterized in that: The guide rail sleeve is provided with two sets of guide grooves, the inner adjustment sleeve is provided with two movable sleeve blocks to open the two guide grooves, and the bottom end of the inner adjustment sleeve is provided with two limit blocks to limit the two movable sleeve blocks respectively; The spacing between the limit blocks is a vacant area, and the movable sleeve blocks in the vacant area limit the freedom of the limit blocks and the inner adjustment sleeve to rotate around the axial direction.

9. A track-type hard-sealed new plug valve according to claim 8, characterized in that: The width of the operating opening is greater than the width of the movable sleeve block. After the inner adjusting sleeve rotates, the adjusting handle and the reference handle are in a mutually unfolded state, and the reference handle is located at the left side wall of the operating opening and the adjusting handle is located at the right side wall of the operating opening.

Images