CN209922680U - Fastener of multi-rope lifting suspension device - Google Patents
Fastener of multi-rope lifting suspension device Download PDFInfo
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- CN209922680U CN209922680U CN201920656294.1U CN201920656294U CN209922680U CN 209922680 U CN209922680 U CN 209922680U CN 201920656294 U CN201920656294 U CN 201920656294U CN 209922680 U CN209922680 U CN 209922680U
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Abstract
The utility model belongs to the technical field of the mine promotes, concretely relates to locking device of multi-rope lifting linkage, include: the valve body is internally provided with an access interface, an oil way and an installation cavity; the mounting cavity penetrates through the valve body and is communicated with the oil way, and a conical sealing surface is arranged at the communication position; the valve core is inserted in the mounting cavity and is provided with a conical surface matched with the conical sealing surface; the valve sleeve is sleeved on the valve core; the valve disc comprises an elastic body and an adjusting nut, the adjusting nut is screwed in the mounting cavity, and the elastic body is mounted between the adjusting nut and the valve core; the valve cover comprises an upper valve cover and a lower valve cover. The locking device with the structure is arranged in the lifting suspension device, so that the pressure balance of the normal working state of the oil cylinder is adjusted, self-locking is realized when an accident occurs, and the potential safety hazard of rope breakage of the lifting steel rope caused by breakage of the communicating pipe is eliminated.
Description
Technical Field
The utility model belongs to the technical field of the mine promotes, concretely relates to many ropes promote linkage's fastener.
Background
In the current multi-rope lifting system of underground mines in China, lifting steel ropes are different in length due to the influence of various factors in the operation process, if no measures are taken, the short steel wire ropes are stressed greatly, the long steel wire ropes are stressed slightly, and the tension of each lifting steel rope is unbalanced; in order to solve the problem, a hydraulic tension automatic balance suspension device is generally adopted to replace the original rigid connection suspension device. Referring to fig. 1, the hydraulic tension automatic balance suspension device comprises a plurality of hydraulic automatic rope regulators 10, a wedge rope clamp 21, a connector 40 and a triangular plate 50, wherein the hydraulic automatic rope regulators 10 comprise a middle plate 11, an adjusting cylinder 12, a side plate 13, a communication pipe 30 and a KJ ball valve 31, the lower end of the middle plate 11 is connected with a piston rod of the adjusting cylinder 12, the upper end of the middle plate 11 is connected with the wedge rope clamp 21, the wedge rope clamp 21 is connected with a lifting steel rope 20, the upper end of the side plate 13 is connected with a cylinder barrel of the adjusting cylinder 12, the lower end of the side plate is connected with the triangular plate 50 through the connector 40, and the triangular plate 50 is connected; the plurality of adjusting cylinders 12 are communicated with each other through a communication pipe 30, and a KJ ball valve 31 suitable for injecting hydraulic oil is arranged on the communication pipe 30. In the above structure, the hydraulic oil of the adjusting cylinder 12 of each lifting steel rope 20 is communicated, the cylinder piston of the short steel rope is contracted, the cylinder piston of the long steel rope is extended, and the hydraulic oil of the cylinder of the short steel rope flows into the cylinder of the long steel rope, so that the tension of each lifting steel rope is balanced. Compared with a rigid connection suspension device, the hydraulic tension automatic balance suspension device greatly reduces the times of manually adjusting the length of the steel wire rope, lightens the labor intensity, improves the lifting efficiency, and meanwhile realizes the tension balance of the lifting steel rope.
However, the hydraulic tension automatic balancing suspension device also has a serious safety hazard: the communication pipe 30 is broken by some accident, causing leakage of the hydraulic oil of the adjusting cylinder 12. The hydraulic oil leakage of the adjusting oil cylinder 12 can cause the oil cylinder to lose the effect of balance tension, the stress of the short steel wire rope and the stress of the long steel wire rope can be different by several times, the short steel wire rope with large stress can be broken, and when the short steel wire rope with large stress is serious, the lifting steel rope can be broken in sequence, the container falls, and major safety accidents occur.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a many ropes promote linkage's fastener to lead to hydraulic tension automatic balance linkage inefficacy and bring serious potential safety hazard's problem because of communicating pipe breaks among the solution prior art.
The utility model provides a many ropes promote linkage's fastener, include: the valve body is internally provided with an access interface, an oil way and an installation cavity; the oil path is communicated with the access interface and the output interface; the mounting cavity penetrates through the valve body and is communicated with the oil way, and a conical sealing surface is arranged at the communication position; the valve core is inserted into the installation cavity, and is provided with a conical surface which is matched with the conical sealing surface; the valve sleeve is sleeved on the valve core; the valve disc comprises an elastic body and an adjusting nut, the adjusting nut is screwed in the mounting cavity, and the elastic body is mounted between the adjusting nut and the valve core; the valve cover comprises an upper valve cover and a lower valve cover, and the upper valve cover and the lower valve cover are plugged at two ends of the installation cavity.
In the fastener of the multi-rope lifting suspension device, it is further preferable that the valve core includes an upper valve core, a middle valve core and a lower valve core, and the upper valve core, the middle valve core and the lower valve core are connected in sequence; the upper valve core is inserted into one end of the mounting cavity in a matched manner; the middle valve core is in a circular truncated cone shape, and a conical surface formed by the circular truncated cone is suitable for being matched and sealed with the conical sealing surface; the lower valve core is connected with the elastic body.
The fastener of the multi-rope lifting suspension device as described above, further preferably, the oil path includes an oil inlet path, an oil chamber, and an oil outlet path, the oil inlet path is communicated with the access interface, the oil outlet path is communicated with the access interface, and the oil chamber is communicated between the oil inlet path and the oil outlet path and located at a crossing position of the oil path and the mounting cavity; the conical sealing surface is arranged in the oil cavity and is suitable for matching with the valve core for self-locking to cut off the oil inlet oil path and the oil outlet oil path.
The fastener of the multi-rope lifting suspension device further preferably comprises at least two straight sections, wherein at least two straight sections are connected with each other at an included angle, and the included angle between two connected straight sections is smaller than or equal to 100 °.
The fastener of the multi-cord lift suspension device as described above, further preferably, the valve housing comprises a housing body and a fastening nut; the sleeve body is in a cap shape, a first central hole is formed in the center of the cap shape and is suitable for being sleeved on the valve core, and the sleeve body is clamped with the mounting cavity in a matched mode through the outer surface; the fastening nut is installed in the installation cavity and is suitable for fixing the sleeve body.
The latch of the multi-cord lift suspension device as described above, further preferably wherein the spool further comprises a tail spool; the tail valve core is connected to the end part of the lower valve core, and the diameter of the tail valve core is smaller than that of the lower valve core; the elastic body is a spring, and the spring is sleeved on the tail valve core and stops the tail valve core and the end part of the lower valve core.
The latch of the multi-cord lift suspension device as described above, further preferably, the valve disc further comprises an upper spring retainer and a lower spring retainer; the spring upper retainer ring and the spring lower retainer ring are sleeved on the tail valve core at two ends of the spring, and the outer diameters of the spring upper retainer ring and the spring lower retainer ring are both larger than the outer diameter of the spring.
The latch of the multi-cord lift suspension device as described above, further preferably, the valve element is a one-piece valve element, or an at least two-piece valve element.
The fastener of the multi-cord lift suspension device further preferably includes a first sealing portion, a second sealing portion and a third sealing portion, wherein the first sealing portion is disposed on the upper valve element, the second sealing portion is disposed on the tapered surface of the middle valve element, and the third sealing portion is disposed on the sleeve body of the valve sleeve.
The latch of the multi-rope hoisting suspension device is further preferably characterized in that the access interface adopts a male standard joint of a KJ series or a DN series, and the access interface adopts a female standard joint of a KJ series or a DN series.
Compared with the prior art, the utility model has the following advantage:
1. the utility model adds the fastener in the hydraulic tension automatic balance suspension device, and utilizes the self-locking principle of the valve core in the sudden change of the hydraulic oil pressure in the oil circuit at the two ends of the fastener, so as to realize that the normal working state of the adjusting oil cylinder does not influence the pressure balance and realize the self-locking when an accident occurs, eliminate the potential safety hazard of rope breakage caused by the breakage of the communicating pipe in the hydraulic tension balance suspension device, not only improve the service life of the steel wire rope in the mine hoisting equipment, but also improve the service life of the mine hoisting equipment;
2. the valve core comprises an upper valve core, a middle valve core and a lower valve core, wherein the upper valve core is suitable for being inserted into one end of the installation cavity in a matching mode, the middle valve core is suitable for self-locking, and the lower valve core is inserted into the first central hole of the valve sleeve in a matching mode and connected with the spring to provide self-locking driving force; in the structure, the arrangement of the upper valve core and the lower valve core limits the moving direction of the whole valve core, so that the valve core can only move up and down, namely when the pressure of an oil way suddenly changes, the middle valve core only has a balance state of mutual matching and self-locking; meanwhile, the upper valve core is positioned at one end of the mounting cavity, is communicated with the outside after the upper valve cover is removed, and is suitable for adjusting the state of the fastener;
3. the utility model discloses an including two at least straight sections in the oil feed oil circuit, and meet two straight sections and be the contained angle and connect, utilize the total pressure loss of the straight section of oil circuit and contained angle department diversion, the hydraulic pressure oil pressure difference at control oil feed oil circuit both ends for adjustment hydro-cylinder hydraulic oil pressure value is the same basically with normal operating condition when the accident, thereby avoids among the hydraulic pressure tension automatic balance suspension device because of the pressure change that the communicating pipe breaks and arouses the adjustment hydro-cylinder to lead to promoting the tension imbalance of steel cable.
Drawings
FIG. 1 is a schematic diagram of a prior art hydraulic automatic tension balancing suspension system;
FIG. 2 is a schematic structural view of the fastener of the multi-rope lifting and hanging device of the present invention showing the unblocked state of the oil path;
fig. 3 is a schematic structural view of the self-locking state of the locking device of the multi-rope lifting and hanging device of the present invention;
fig. 4 is a schematic diagram of a hydraulic tension automatic balance suspension device using a latch of the multi-rope hoist suspension device of the present invention.
Description of reference numerals:
10-hydraulic automatic rope regulator, 11-middle plate, 12-regulating oil cylinder, 13-side plate, 20-lifting steel rope, 21-wedge rope clamp, 30-communicating pipe, 31-KJ ball valve, 40-connector, 50-triangular plate and 60-fastener;
100-valve body, 110-oil cavity, 120-conical sealing surface, 130-oil inlet oil way, 140-oil outlet oil way, 150-oil inlet, 160-oil outlet, 170-access interface, 180-access interface and 190-loading and unloading interface;
200-valve core, 210-upper valve core, 211-first sealing part, 220-middle valve core, 221-second sealing part, 222-end sealing surface, 230-lower valve core, 240-tail valve core;
300-a valve sleeve, 310-a sleeve body, 320-a sliding sealing ring, 330-a static surface sealing ring, 340-an end surface sealing ring and 350-a fastening nut;
400-valve disc, 410-spring, 420-lower spring retainer, 430-adjusting nut, 440-upper spring retainer;
500-valve cap, 510-upper valve cap, 520-lower valve cap.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the present application, the multi-rope in the multi-rope hoist suspension system means two or more hoist ropes 20.
As shown in fig. 2-3, the latch 60 of the multi-cord lift suspension apparatus provided in this embodiment specifically includes: the valve comprises a valve body 100, wherein an access interface 170, an access interface 180, an oil circuit and an installation cavity are arranged in the valve body 100; the oil path is communicated with the access interface 170 and the access interface 180; the mounting cavity penetrates through the valve body 100 and is in cross communication with the oil way in the middle, and a conical sealing surface 120 is arranged at the cross communication position; the valve core 200 is inserted into the installation cavity, and a conical surface is arranged on the valve core 200 and is matched with the conical sealing surface 120; the valve sleeve 300 is inserted into the installation cavity, sleeved on the valve core 200 and suitable for sealing the oil path; a valve disc 400, the valve disc 400 including an elastic body and an adjusting nut 430, the adjusting nut 430 being screwed in the mounting cavity, the elastic body being mounted between the adjusting nut 430 and the valve cartridge 200; the valve cover 500 comprises an upper valve cover 510 and a lower valve cover 520, and the upper valve cover 510 and the lower valve cover 520 are sealed at two ends of the installation cavity.
In the above structure, the valve core 200 includes an upper valve core 210, a middle valve core 220 and a lower valve core 230, and the upper valve core 210, the middle valve core 220 and the lower valve core 230 are connected in sequence; the upper valve core 210 is inserted into one end of the installation cavity in a fitting manner, and the lower valve core 230 is inserted into the valve sleeve installed in the installation cavity in a fitting manner, is suitable for sealing the oil path and is limited by the installation cavity and the valve sleeve 300, so that the whole valve core 200 only moves up and down in the installation cavity; the lower valve core 230 is connected with the elastic body, is suitable for being acted by upward elastic force of the elastic body and moves upwards when the elastic force is larger than the pressure of the oil path borne by the valve core 200; the middle valve element 220 is in a circular truncated cone shape, the side surface of the middle valve element is a conical surface and is positioned in the oil path, the upper surface and the side surface of the middle valve element are subjected to downward oil pressure from the oil path, the surface except for the sealing in the lower surface of the middle valve element is subjected to upward oil pressure from the oil path, and the downward oil pressure is greater than the upward oil pressure, namely the valve element 200 is subjected to downward oil pressure when the oil path is smooth. When the oil pressure difference in the oil path suddenly changes, the spring acting force applied to the entire valve core 200 is greater than the oil pressure, so that the entire valve core 200 moves upward, the side surface of the middle valve core 220 can be matched and sealed with the conical sealing surface 120, and the oil path is cut off. Further, the valve core 200 further comprises a tail valve core 240, wherein the tail valve core 240 is connected to an end of the lower valve core 230, and the diameter of the tail valve core 240 is smaller than that of the lower valve core 230; the elastic body is a spring 410, and the spring 410 is sleeved on the tail valve core 240 and stops against the end of the lower valve core 230. The tail spool 240 is configured to limit the direction in which the spring 410 is elastically deformed such that it can only compress and return in the installation direction of the spool 200. Preferably, the spring 410 in this embodiment is a belleville spring. Preferably, the valve core 200 is an at least two-section combined valve core 200, which may be two-section, three-section or four-section, or may be an integral one, and when in specific use, the weight and volume of the valve core 200 and the surface treatment requirements of different section structures may be comprehensively considered, and an optimal valve core 200 structure may be selected.
In the above structure, the valve body 200 having the upper valve body 210, the middle valve body 220, the lower valve body 230 and the tail valve body 240 is an optimized structure design, and various problems in the design, installation and implementation application of the locking device are comprehensively solved. Therefore, the valve core 200 that only satisfies the forced sealing requirement in the present embodiment, i.e. is forced in two directions and moves when the force in one direction is smaller than the force in the other direction, and can form a seal with the conical sealing surface 120 when moving upward, also belongs to the protection scope of the present embodiment, such as the valve core 200 structure without the upper valve core in the present embodiment.
In the above structure, the oil path includes an oil inlet path 130, an oil chamber 110 and an oil outlet path 140, one end of the oil inlet path 130 is communicated with the access interface 170, and the other end is communicated with the oil chamber 110 through an oil inlet 150; one end of the oil outlet oil path 140 is communicated with the oil outlet port 180, and the other end is communicated with the oil chamber 110 through an oil outlet 160; the oil chamber 110 is located at the intersection of the oil path and the mounting chamber; the conical sealing surface 120 is arranged in the oil chamber 110 and is suitable for matching with the middle valve core 220 in a self-locking manner to cut off the oil inlet path 130 and the oil outlet path 140. When the oil path is unblocked, the oil inlet 150 is located at the side of the middle valve core 220, the oil outlet 160 is located at the upper part of the middle valve core 220, the oil inlet 150 is communicated with the oil outlet 160, the oil pressure of the oil path applies downward pressure to the upper surface and the side surface of the middle valve core 220, meanwhile, the oil pressure of the oil path applies upward pressure to the surface except for sealing in the lower surface of the middle valve core 220, wherein the downward pressure is greater than the upward pressure, so that the middle valve core 220 is integrally subjected to downward oil pressure, and the downward pressure is greater than the upward spring acting force applied to the valve core 200 by the spring 410, and further, the lower surface of the middle valve core 220 is in contact with the upper surface of the valve sleeve 300 and keeps balance; when the pressure of the oil chamber 110 is reduced to a set value and below the set value, the downward pressure of the oil path borne by the middle valve core 220 is reduced and is smaller than the upward spring acting force applied to the valve core 200 by the spring 410, the valve core 200 moves upwards integrally, so that the side surface of the middle valve core 220 is matched and sealed with the conical sealing surface 120, the oil path is blocked, the communication between the adjusting oil cylinder 12 and the communication pipe 30 is cut off, the adjusting oil cylinder 12 is sealed, and the safety self-locking is realized.
In the structure, the oil inlet circuit 130 comprises at least two straight sections, at least two of the straight sections are connected with each other at an included angle, and the included angle between two of the straight sections is smaller than or equal to 100 degrees. In this embodiment, the included angle between the straight sections is suitable for the diversion, and the setting of straight section and diversion is suitable for the on-way resistance and the local resistance of increase hydraulic oil, makes the oil feed oil circuit becomes the oil feed steady voltage oil circuit that has the stable adjustment hydro-cylinder 12 hydraulic oil pressure function of control, and then makes the oil pressure in the adjustment hydro-cylinder 12 and the oil pressure in the oil pocket 110 have a reasonable oil pressure difference. Preferably, the oil inlet path 130 is provided with 2-16 straight sections and 1-15 90-degree right-angle turning directions.
In the above structure, the valve housing 300 includes a housing body 310 and a fastening nut 350; the sleeve body 310 is in a cap shape, a first central hole is formed in the center of the cap shape and is suitable for being sleeved on the valve core 200, and the sleeve body 310 is matched and clamped with the installation cavity through the outer surface; the fastening nut 350 is installed in the installation cavity and is adapted to fix the sheath body 310. The valve housing 300 is provided to fit the valve cartridge 200 into the mounting cavity of the valve body 100 and defines a moving direction of the valve cartridge 200 as a whole with the upper valve cartridge 210.
In the above structure, the valve disc 400 further includes an upper spring retainer 440 and a lower spring retainer 420, the upper spring retainer 440 and the lower spring retainer 420 are sleeved on the tail valve element 240 at two ends of the spring 410, and the outer diameters of the upper spring retainer 440 and the lower spring retainer 420 are both greater than the outer diameter of the spring 410. In the valve disc 400, the adjustment nut 430 is adapted to adjust the height of the spring 410, thereby adjusting the elastic force of the spring 410. The upper spring retainer 440 and the lower spring retainer 420 are adapted to improve the assembling performance of the spring 410 with the valve core 200 and the adjusting nut 430, and remove the limitation on the shape of the spring 410, thereby facilitating the selection of the proper spring 410.
In the above structure, the valve further includes a first sealing portion 211, a second sealing portion 221 and a third sealing portion, the first sealing portion 211 and the second sealing portion 221 are both O-ring seals, the first sealing portion 211 is disposed on the upper valve body 210, and the second sealing portion 221 is disposed on the conical surface of the middle valve body 220; the third sealing portion is disposed on the housing body 310 of the valve housing 300. The three third sealing portions, which include a stationary seal ring 330, an end seal ring 340 and a sliding seal ring 320, are also O-ring seals, and are respectively disposed on the outer surface of the sleeve body 310 of the valve sleeve 300, the end sealing surface 222 (i.e., the upper surface) and the inner surface of the first central hole, and are adapted to form a complete seal, so that a sealed oil chamber 110 is formed in the installation cavity of the valve body 100.
In the above structure, the access interface 170 adopts a male standard joint of KJ series or DN series, and the access interface 180 adopts a female standard joint of KJ series or DN series, so as to facilitate the adaptation with the existing equipment.
In the above structure, the port of the installation cavity on the side of the upper valve core 210 is the loading and unloading port 190, which is suitable for applying a load through the loading and unloading port by an external device and for adjusting the state of the latch 60.
Further, the present embodiment also discloses the following principle of the above structure:
in this embodiment, the on-way pressure loss Δ P of the oil inlet passagey＝λ(l/d)(ρv2(2), lambda-on-way loss resistance coefficient, l-oil path length, d-oil path diameter, v-flow speed, rho-hydraulic oil density; local pressure loss Δ Pj＝ξ(ρv2/2), ξ -local loss coefficient; total pressure loss Δ P ═ Δ Py+ΔPj＝λ(l/d)(ρv2/2)+ξ(ρv2/2)。
Under the normal working state, the flowing speed of the hydraulic oil in the oil path between the adjusting oil cylinders 12 is very small, the total pressure loss of the oil path is also very small, the oil pressure difference is very small, the oil pressure in each adjusting oil cylinder 12 has only a very small difference, and the tension balance of each lifting steel rope 20 is not influenced; if the communicating pipe 30 is broken and leaks, the hydraulic oil leaks out, the flow rate of the hydraulic oil in the oil path is large, the total pressure loss of the oil path is also large (the pressure loss is proportional to the square of the flow rate), and the oil pressure difference between the adjusting cylinder and the oil chamber 110 is large, so that the hydraulic oil in the adjusting cylinder 12 can basically keep the original pressure. The oil outlet path 140 is a common path, and the on-way resistance and the local resistance of the path (including the communicating pipe) between the oil chamber 110 and the communicating pipe 30 are small, and the total pressure loss is 15% -50% of the total pressure loss of the oil inlet path during design.
As shown in fig. 4, in the normal operating state, the extension and retraction of the piston of the adjusting cylinder 12 are slow, and the hydraulic oil pressures in the entire system, such as the adjusting cylinder 12, the locking device 60, the communicating pipe 30, and the KJ ball valve 31, have a small difference, which is approximately equal, and are set as P. If the communication pipe 30 is broken and leaks, the oil pressure of the hydraulic oil leaking from the leakage point of the communication pipe 30 is 0, and the oil pressure of the adjustment cylinder 12 is P, the oil pressure of the oil chamber 110 of the closure 60 is 0.13P to 0.33P.
As shown in fig. 2-3, the downward pressure of the hydraulic oil in the oil chamber 110 of the valve core 200 is the difference between the downward pressure on the upper surface and the side surface of the middle valve core 220 and the upward pressure on the lower surface of the middle valve core 220 except for the seal, in the normal working state, the downward pressure on the valve core 200 is greater than the upward acting force of the spring 410, the valve core 200 is in the open state, and the oil path between the adjusting cylinders 12 is smooth. If the communicating pipe 30 is broken and leaks, the oil pressure of the oil chamber 110 of the locking device 60 is reduced, the downward pressure applied to the valve core 200 is reduced, when the downward pressure applied to the valve core 200 is smaller than the acting force of the spring 410, the valve core 200 moves upwards to close the conical sealing surface 120 under the action of the spring 410, the upper part and the lower part of the oil chamber 110 are separated by the middle valve core 220, the locking device 60 is closed, the oil inlet and the oil outlet of each adjusting oil cylinder 12 are blocked by the locking device 60, self-locking is realized, the hydraulic oil in the adjusting oil cylinder 12 is locked, the original pressure is basically maintained, and the tension of each lifting steel rope 20 is basically balanced.
Before the oil is injected into the adjusting oil cylinder 12, the valve core 200 moves upwards under the action of the elastic force of the spring 410 to cut off an oil way, the fastener 60 is in a closed state, before the oil is injected, an opening load is applied to the valve core 200 through a loading tool and equipment by utilizing the loading and unloading interface 190 at the upper end of the installation cavity, so that the valve core 200 moves downwards, and the oil way is smooth; then, the oil is filled into each adjusting oil cylinder 12, the position of the piston of the oil cylinder is adjusted, the suspension device loads and adjusts the pressure generated by the hydraulic oil of the oil cylinder 12, the pressure of the hydraulic oil on the valve core 200 is greater than the elastic force of the spring 410, so that after the loading tool and the opening load of the equipment on the valve core 200 are removed and the loading and unloading port 190 is blocked, the valve core 200 is still in an open state, namely, the oil path is in a smooth state. And (4) unloading the tool and equipment applying the opening load, and plugging the loading and unloading port 190 by using the upper valve plug 510.
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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. A latch for a multi-cord lift suspension device, comprising:
the valve body is internally provided with an access interface, an oil way and an installation cavity; the oil path is communicated with the access interface and the output interface; the mounting cavity penetrates through the valve body and is communicated with the oil way, and a conical sealing surface is arranged at the communication position;
the valve core is inserted into the installation cavity, and is provided with a conical surface which is matched with the conical sealing surface;
the valve sleeve is sleeved on the valve core;
the valve disc comprises an elastic body and an adjusting nut, the adjusting nut is screwed in the mounting cavity, and the elastic body is mounted between the adjusting nut and the valve core;
the valve cover comprises an upper valve cover and a lower valve cover, and the upper valve cover and the lower valve cover are plugged at two ends of the installation cavity.
2. The latch for a multi-cord lift suspension device of claim 1,
the valve core comprises an upper valve core, a middle valve core and a lower valve core, and the upper valve core, the middle valve core and the lower valve core are connected in sequence; the upper valve core is inserted into one end of the mounting cavity in a matched manner; the middle valve core is in a circular truncated cone shape, and a conical surface formed by the circular truncated cone is suitable for being matched and sealed with the conical sealing surface; the lower valve core is connected with the elastic body.
3. The latch for a multi-cord lift suspension device of claim 1,
the oil path comprises an oil inlet path, an oil cavity and an oil outlet path, the oil inlet path is communicated with the access interface, the oil outlet path is communicated with the access interface, the oil cavity is communicated between the oil inlet path and the oil outlet path and is positioned at the intersection position of the oil path and the mounting cavity;
the conical sealing surface is arranged in the oil cavity and is suitable for matching with the valve core for self-locking to cut off the oil inlet oil path and the oil outlet oil path.
4. The latch for a multi-cord lift suspension device of claim 3,
the oil inlet oil path comprises at least two straight sections which are connected in an included angle manner, and the included angle between the two straight sections which are connected is smaller than or equal to 100 degrees.
5. The latch for a multi-cord lift suspension device of claim 1,
the valve sleeve comprises a sleeve body and a fastening nut; the sleeve body is in a cap shape, a first central hole is formed in the center of the cap shape and is suitable for being sleeved on the valve core, and the sleeve body is clamped with the mounting cavity in a matched mode through the outer surface; the fastening nut is installed in the installation cavity and is suitable for fixing the sleeve body.
6. The latch for a multi-cord lift suspension device of claim 2,
the valve core also comprises a tail valve core; the tail valve core is connected to the end part of the lower valve core, and the diameter of the tail valve core is smaller than that of the lower valve core;
the elastic body is a spring, and the spring is sleeved on the tail valve core and stops the tail valve core and the end part of the lower valve core.
7. The latch for a multi-cord lift suspension device of claim 6,
the valve disc also comprises an upper spring retainer ring and a lower spring retainer ring; the spring upper retainer ring and the spring lower retainer ring are sleeved on the tail valve core at two ends of the spring, and the outer diameters of the spring upper retainer ring and the spring lower retainer ring are both larger than the outer diameter of the spring.
8. The latch for a multi-cord lift suspension device of claim 6,
the valve core is an integral valve core or an at least two-section combined valve core.
9. The latch for a multi-cord lift suspension device of claim 2 further comprising a first seal disposed on said upper spool, a second seal disposed on a tapered surface of said middle spool, and a third seal disposed on a jacket of said valve housing.
10. The latch for a multi-cord lift suspension of any one of claims 1-9 wherein said access interface employs a male standard joint of the KJ series or DN series and said access interface employs a female standard joint of the KJ series or DN series.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920656294.1U CN209922680U (en) | 2019-05-07 | 2019-05-07 | Fastener of multi-rope lifting suspension device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920656294.1U CN209922680U (en) | 2019-05-07 | 2019-05-07 | Fastener of multi-rope lifting suspension device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110015604A (en) * | 2019-05-07 | 2019-07-16 | 天津京安高新技术有限公司 | A kind of latch of multi rope winding suspension arrangement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110015604A (en) * | 2019-05-07 | 2019-07-16 | 天津京安高新技术有限公司 | A kind of latch of multi rope winding suspension arrangement |
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