CN219139931U - Adjustable low-temperature check valve - Google Patents
Adjustable low-temperature check valve Download PDFInfo
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- CN219139931U CN219139931U CN202223565674.5U CN202223565674U CN219139931U CN 219139931 U CN219139931 U CN 219139931U CN 202223565674 U CN202223565674 U CN 202223565674U CN 219139931 U CN219139931 U CN 219139931U
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- 238000007789 sealing Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 210000004907 gland Anatomy 0.000 claims description 13
- 230000013011 mating Effects 0.000 claims 1
- 238000012856 packing Methods 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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Abstract
The utility model discloses an adjustable low-temperature check valve, which comprises a valve body, a valve cover, a valve rod, a valve clack and an adjusting mechanism, wherein a liquid inlet channel and a liquid outlet channel in the valve body are communicated through a valve seat through hole; the valve cover covers the upper opening of the valve body; the valve rod is arranged in the valve body, the upper part of the valve rod is connected with the adjusting mechanism, and the lower part of the valve rod is connected with the valve clack in a sliding manner along the axial direction; the bottom of the valve clack is provided with a sealing gasket matched with the valve seat through hole, and an elastic element in a compression state is arranged between the valve rod and the valve clack; the lower part of the adjusting mechanism passes through the valve cover and is connected with the large-diameter part of the valve rod, and the adjusting mechanism is used for adjusting the height of the valve rod relative to the valve clack so as to change the compression degree of the elastic element, thereby changing the spring force exerted on the valve clack and finally realizing the valve pressure value of the low-temperature check valve.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to an adjustable low-temperature check valve capable of adjusting a valve pressure value.
Background
The low-temperature check valve applied to the market at present has two types, one is a swing check valve, and the valve opening and closing part is automatically opened or closed only by medium flow and force so as to prevent the medium from flowing backwards, and the sealing effect is poor, and particularly when the low-temperature check valve is applied to the low-temperature field, the leakage phenomenon is very large; the other is a spring type check valve, a spring is added between an opening and closing part and a valve body when the check valve is sealed, the spring is in a compressed state when the valve is in a closed state, the sealing effect of the valve is improved, however, when the valve is in the closed state, the relative distance between the opening and closing part and the valve body is fixed, the compression degree of the spring in the compressed state between the opening and closing part and the valve body is not adjustable, therefore, the force value of the spring force generated by the spring is a fixed value and cannot be adjusted, when the valve is installed on a tank body, because external factors need to change the valve pressure value, the pressure of the tank body can only be removed cleanly, the valve is disassembled, the valve is sent to a valve factory to be adjusted, and after the pressure test is finished, the valve can be installed again, and the process is time-consuming and labor-consuming, and the cost is not estimated.
In response to such problems, the applicant has further diligently studied and has produced
Disclosure of Invention
In order to solve the problems in the prior art, the inventor of the utility model designs and develops a low-temperature check valve with safe and reliable performance and adjustable valve pressure value at any time according to actual working requirements.
The low-temperature check valve comprises a valve body, a valve cover, a valve rod, a valve clack and an adjusting mechanism, wherein a liquid inlet channel and a liquid outlet channel are arranged in the valve body, and the liquid inlet channel and the liquid outlet channel are communicated through a valve seat through hole formed in a valve seat; the valve cover covers the upper opening of the valve body; the valve rod is arranged in the valve body and comprises a large-diameter part and a small-diameter part, the top end of the large-diameter part is connected with the adjusting mechanism, the outer diameter size of the valve rod is matched with the inner diameter size of an opening above the valve body, and the small-diameter part extends into a hole of the valve clack and is connected with the valve clack in a sliding mode along the axial direction; the bottom of the valve clack is provided with a sealing gasket matched with the valve seat through hole, and an elastic element in a compression state is arranged between the valve rod and the valve clack; the lower part of the adjusting mechanism penetrates through the valve cover to be connected with the large-diameter part of the valve rod, and the adjusting mechanism is used for adjusting the height of the valve rod relative to the valve clack.
Further, the elastic element is a spring element, the spring element is sleeved on the small-diameter portion of the valve rod and the upper portion of the valve clack, two ends of the spring element respectively prop against the bottom surface of the large-diameter portion and the shoulder portion of the valve clack, and when the check valve is in a closed state, the spring element is in a compressed state.
Further, the elastic element is a spring element, the spring element is disposed at the bottom of the hole of the valve clack, two ends of the spring element respectively prop against the bottom surface of the small diameter portion and the bottom surface of the hole, and when the check valve is in a closed state, the spring element is in a compressed state.
Further, the adjusting mechanism comprises an adjusting nut and an adjusting screw, the adjusting nut is fixed above the valve cover, the adjusting screw is in threaded connection with the adjusting nut, the lower end of the adjusting screw penetrates through the valve cover and abuts against the upper surface of the large-diameter part of the valve rod; when the adjusting screw is rotated, the lower end of the adjusting screw moves downwards along with the rotation of the adjusting screw, so that the valve rod moves downwards, and a spring element arranged between the valve rod and the valve clack is further compressed; when the adjusting screw is rotated in the reverse direction, the lower end of the adjusting screw moves upward with the reverse rotation thereof, the spring member in the compressed state is released, and the valve stem moves upward.
Further, an adjusting handle is arranged at the top end of the adjusting screw.
Further, the annular groove is formed in the inner side wall surface of the opening in the upper portion of the valve body, a V-shaped sealing ring is arranged in the annular groove, the V-shaped sealing ring comprises a support ring, an elastic sealing ring and a compression ring which are arranged in a superposition mode, the number of the elastic sealing rings is multiple, and the elastic sealing ring is clamped between the support ring and the compression ring.
Further, the lower part of the valve cover is provided with an annular boss, the annular boss is matched with the annular groove, an outer annular groove is respectively formed in the outer side wall surface of the annular boss and the outer side wall surface of the large-diameter part of the valve rod, and an O-shaped sealing ring is arranged in the outer annular groove.
Further, an annular flange matched with the sealing gasket is wound around the periphery of the bottom surface of the valve clack.
Further, the bottom of the valve clack also comprises a valve clack rod piece extending along the central axis direction of the valve clack, the valve clack rod piece is sequentially sleeved with an annular low-temperature sealing gasket and an annular gland from top to bottom and is fastened by a fastening nut, and the outer diameter of the annular gland is smaller than the aperture of the valve seat through hole.
Further, the inner side surface of the annular low-temperature sealing gasket and the outer side surface of the annular gland are respectively provided with mutually matched inclined surfaces.
The low-temperature check valve provided by the utility model is provided with the adjusting mechanism, and the height of the valve rod relative to the valve clack can be adjusted according to actual requirements, so that the compression degree of a spring element arranged between the valve rod and the valve clack is changed, and the spring force applied to the valve clack is changed, so that the valve pressure value of the low-temperature check valve is finally realized; on the other hand, the sealing gasket below the valve clack is made of low-temperature resistant materials, can be normally used in a low-temperature environment of-200 ℃, and has good sealing performance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 shows a cross-sectional view of a preferred embodiment of the low temperature check valve of the present utility model;
FIG. 2 is a schematic view showing an opened state of the low temperature check valve shown in FIG. 1;
FIG. 3 is a schematic view showing an adjustment state of the low temperature check valve shown in FIG. 1;
FIG. 4 shows a cross-sectional view of yet another preferred embodiment of the low temperature check valve of the present utility model;
fig. 5 shows a schematic diagram of the assembly of the valve stem with the valve flap.
[ Main element symbols description ]
Valve body 1
Liquid inlet channel 11 and liquid outlet channel 12
Valve seat 13
Valve seat through hole 14 boss 141
Valve cover 2
Valve rod 3
Valve clack 4
The hole 42 guides the groove 421
V-shaped sealing ring 6
Support ring 61 elastic seal ring 62
Adjusting nut 71 adjusts screw 72
O-shaped sealing ring 8
Detailed Description
In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
In the description of the present utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present utility model.
1-3, a preferred embodiment of an adjustable low-temperature check valve according to the present utility model is shown, which comprises a valve body 1, a valve cover 2, a valve rod 3, a valve clack 4 and an adjusting mechanism, wherein a liquid inlet channel 11 and a liquid outlet channel 12 are arranged in the valve body 1, and the liquid inlet channel 11 and the liquid outlet channel 12 are communicated through a valve seat through hole 14 formed on a valve seat 13; the valve cover 2 is covered at the upper opening of the valve body 1 by a plurality of bolts 21; the valve rod 3 is arranged in the valve body 1 and comprises a large-diameter part 31 and a small-diameter part 32, the top end of the large-diameter part 31 is connected with an adjusting mechanism, the outer diameter size of the large-diameter part is matched with the inner diameter size of an upper opening of the valve body, the small-diameter part 32 stretches into a hole 42 of the valve clack 4 matched with the small-diameter part, the outer diameter of the small-diameter part 32 is matched with the inner diameter of the hole 42, and the small-diameter part 32 can reciprocate in the hole 42 along the axial direction; the valve clack 4 can reciprocate up and down relative to the valve rod 3 in the axial direction, a sealing gasket 41 matched with the valve seat through hole 14 is arranged at the bottom of the valve clack, the size of the sealing gasket 41 is larger than that of the valve seat through hole 14, a protrusion 141 is arranged at the orifice of the valve seat through hole 14, and when the sealing gasket 41 covers the valve seat through hole 14, the protrusion 141 is propped against the sealing gasket 41; a spring element 5 is arranged between the valve rod 3 and the valve clack 4, the spring element 5 is sleeved on the small diameter part 32 of the valve rod 3 and the upper part of the valve clack 4, two ends of the spring element 5 respectively prop against the bottom surface of the large diameter part 31 and the shoulder 47 of the valve clack 4, when the check valve is in a closed state, the spring element 5 is in a compressed state, when the valve clack 4 of the check valve is jacked up under the action of pressure, the check valve is opened (as shown in fig. 2), the spring element 5 is further compressed, once the medium pressure at the position of the valve seat through hole 14 is reduced, the spring force generated by the spring element 5 is not enough to be resisted, and the valve clack 4 falls back again under the combined action of gravity and the spring force, so that the valve seat through hole 14 is closed; the adjusting mechanism comprises an adjusting nut 71 and an adjusting screw 72, the adjusting nut 71 is fixed above the valve cover 2, the adjusting screw 72 is in threaded connection with the adjusting nut 71, and the lower end of the adjusting screw 72 passes through the valve cover 2 to prop against the upper surface of the large-diameter part 31 of the valve rod 3; when the adjusting screw 72 is rotated, the lower end of the adjusting screw 72 moves downward with its rotation, thereby pressing down the valve stem 3 to move downward, and when the valve flap 4 is kept in a stationary state, the height of the valve stem 3 relative to the valve flap 4 decreases, the spring member 5 provided between the valve stem 3 and the valve flap 4 is further compressed, and the spring force generated by the spring member 5 further increases; when the adjusting screw 72 is reversely rotated, the lower end of the adjusting screw 72 moves upwards along with the reverse rotation of the adjusting screw, at the moment, the valve rod 3 is not propped against the lower end of the adjusting screw 72, the spring element 5 in a compressed state is released to a certain extent, the spring force generated by the spring element 5 is reduced, the adjusting screw 72 can be sprung upwards under the action of the spring element 5 in the compressed state, and the height of the valve rod 3 relative to the valve clack 4 is increased.
In actual use, when the valve pressure value of the low temperature check valve needs to be increased, the adjusting screw 72 can be rotated when the low temperature check valve is in a closed state, so that the lower end of the adjusting screw 72 moves downwards along with the rotation of the adjusting screw, thereby reducing the height of the valve rod 3, reducing the height of the valve rod 3 relative to the valve clack 4, and further compressing the spring element 5 arranged between the valve rod 3 and the valve clack 4 (as shown in fig. 3) to generate larger spring force, in this case, the valve clack 4 needs to have larger pressure when being pushed by the pressure of the medium flowing through the position of the valve seat through hole 14, so as to increase the valve pressure value of the low temperature check valve; conversely, when the valve pressure value of the low temperature check valve needs to be reduced, the adjusting screw 72 can be reversely rotated when the low temperature check valve is in the closed state, so that the lower end of the adjusting screw 72 moves upwards along with the reverse rotation of the adjusting screw, at the moment, the valve rod 3 is not propped against the lower end of the adjusting screw 72, the spring element 5 in the compressed state is released to a certain extent, the adjusting screw 72 is sprung upwards under the action of the spring element 5, the height of the valve rod 3 relative to the valve clack 4 is increased, the spring force generated by the spring element 5 is reduced, and in this case, in order to enable the valve clack 4 to be lifted and kept in the continuously-opened state under the pushing of the pressure of the medium flowing through the position of the valve seat through hole 14, the required medium pressure flowing through the valve seat through hole 14 is reduced, so that the purpose of reducing the valve pressure value of the low temperature check valve is achieved.
Further, as shown in fig. 1-3, an annular flange 43 matched with the sealing gasket is wound around the bottom surface of the valve clack 4, a containing space for the sealing gasket 41 is formed on the bottom surface of the valve clack 4 by the annular flange 43, and the inner wall surface of the annular flange 43 is mutually attached to the outer side surface of the sealing gasket 41, so that a good sealing effect is provided for the low-temperature check valve, and leakage of medium from the back surface of the main seal is prevented.
Preferably, in order to make the sealing pad 41 better adapt to the low-temperature environment, the sealing pad 41 is designed to be a low-temperature sealing pad made of reinforced polytetrafluoroethylene, and the sealing pad made of the reinforced polytetrafluoroethylene can be normally used at-200 ℃, has smaller hardness in a low-temperature state, is more beneficial to low-temperature sealing, and has good sealing performance in the low-temperature environment.
Furthermore, in order to avoid the gasket takes place to drop under the repeated impact of medium, influences low temperature check valve's normal use, the bottom of valve clack 4 still includes along valve clack member 44 that valve clack center pin direction extends and sets up, valve clack member top-down overlaps in proper order and is annular low temperature gasket and annular gland 45, low temperature gasket passes through fastening nut 46 with annular gland 45 and fastens, annular gland 45's external diameter is less than the aperture of disk seat through-hole 14, like this when valve clack 4 closing cap in the disk seat through-hole 14, annular gland 45 can not with the pore wall of disk seat through-hole 14 contacts, can not influence the leakproofness of gasket.
Preferably, as shown in fig. 1-3, the inner side surface of the annular low-temperature sealing gasket and the outer side surface of the annular gland 45 are respectively provided with mutually matched inclined surfaces, when the fastening nut 46 is continuously screwed, the annular gland 45 with a trapezoid cross section can further press the annular low-temperature sealing gasket under the compression of the fastening nut 46, so that when the check valve works in an ultralow temperature state, the deformation caused by the low-temperature shrinkage of the sealing gasket can be effectively prevented, and the occurrence of the condition of valve leakage is avoided.
Further, in order to enhance the tightness between the valve cover 2 and the valve body 1, as shown in fig. 1-3, an annular groove 15 is formed on the inner side wall surface of the opening above the valve body 1, and a V-shaped sealing ring 6 fully matched with the annular groove 15 is disposed in the annular groove 15, that is, the outer wall surface of the V-shaped sealing ring 6 is attached to the wall surface of the annular groove 15, and the inner side wall surface of the outer wall surface of the V-shaped sealing ring 6 is attached to the outer side wall surface of the large diameter portion 31 of the valve rod 3, for example, the V-shaped sealing ring includes a support ring 61, an elastic sealing ring 62 and a compression ring 63 which are stacked, wherein the number of the elastic sealing rings 62 is 3 and is sandwiched between the support ring 61 and the compression ring 63.
In addition, the lower part of the valve cover 2 is provided with an annular boss 22, the annular boss 22 is matched with the annular groove 15, when the valve cover 2 is buckled on the upper opening of the valve body, the annular boss 22 can be buckled in the annular groove 15, and the bottom surface of the annular boss 22 and the bottom surface of the annular groove 15 are used for co-extruding the V-shaped sealing ring 6 arranged in the annular groove 15, so that the V-shaped sealing ring 6 can better exert the sealing performance.
As shown in fig. 1-3, an outer ring groove is formed on the outer side wall surface of the annular boss 22 and the outer side wall surface of the large diameter portion 31 of the valve rod 3, and an O-ring 8 is disposed in the outer ring groove.
As shown in fig. 4, a preferred embodiment of an adjustable low-temperature check valve according to the present utility model is shown, which comprises a valve body 1, a valve cover 2, a valve rod 3, a valve clack 4 and an adjusting mechanism, wherein a liquid inlet channel 11 and a liquid outlet channel 12 are arranged in the valve body 1, and the liquid inlet channel 11 and the liquid outlet channel 12 are communicated through a valve seat through hole 14 arranged on a valve seat 13; the valve cover 2 is covered at the upper opening of the valve body 1 by a plurality of bolts 21, and a gasket 9 is clamped between the valve cover 2 and the valve body 1; the valve rod 3 is arranged in the valve body 1 and comprises a large-diameter part 31 and a small-diameter part 32, the top end of the large-diameter part 31 is connected with an adjusting mechanism, the outer diameter size of the large-diameter part is matched with the inner diameter size of an upper opening of the valve body, the small-diameter part 32 stretches into a hole 42 of the valve clack 4 matched with the small-diameter part, the outer diameter of the small-diameter part 32 is matched with the inner diameter of the hole 42, and the small-diameter part 32 can reciprocate in the hole 42 along the axial direction; the valve clack 4 can reciprocate up and down relative to the valve rod 3 in the axial direction, a sealing gasket 41 matched with the valve seat through hole 14 is arranged at the bottom of the valve clack 4, a spring element 5 is arranged between the valve rod 3 and the valve clack 4, the spring element 5 is arranged at the bottom of a hole 42 of the valve clack 4, two ends of the spring element 5 respectively prop against the bottom surface of the small diameter part 32 and the bottom surface of the hole 42, when the check valve is in a closed state, the spring element 5 is in a compressed state, when the valve clack 4 of the check valve is jacked up under the action of pressure, the spring element 5 is further compressed, once the medium pressure at the position of the valve seat through hole 14 is reduced, the spring force generated by the spring element 5 is not enough to be resisted, and the valve seat through hole 14 is closed again by the falling back of the valve clack 4 under the combined action of gravity and the spring force, so that the check valve is closed; the adjusting mechanism comprises an adjusting nut 71 and an adjusting screw 72, the adjusting nut 71 is fixed above the valve cover 2, the adjusting screw 72 is in threaded connection with the adjusting nut 71, and the lower end of the adjusting screw 72 passes through the valve cover 2 to prop against the upper surface of the large-diameter part 31 of the valve rod 3; when the adjusting screw 72 is rotated, the lower end of the adjusting screw 72 moves downward with its rotation, thereby pressing down the valve stem 3 to move downward, and when the valve flap 4 is kept in a stationary state, the height of the valve stem 3 relative to the valve flap 4 decreases, the spring member 5 provided at the bottom of the hole 42 is further compressed, and the spring force generated by the spring member 5 further increases; when the adjusting screw 72 is reversely rotated, the lower end of the adjusting screw 72 moves upwards along with the reverse rotation of the adjusting screw, at the moment, the valve rod 3 is not propped against the lower end of the adjusting screw 72, the spring element 5 in a compressed state is released to a certain extent, the spring force generated by the spring element 5 is reduced, the adjusting screw 72 can be sprung upwards under the action of the spring element 5 in the compressed state, and the height of the valve rod 3 relative to the valve clack 4 is increased.
In actual use, when the valve pressure value of the low-temperature check valve needs to be increased, the adjusting screw 72 can be rotated when the low-temperature check valve is in a closed state, so that the lower end of the adjusting screw 72 moves downwards along with the rotation of the adjusting screw, thereby reducing the height of the valve rod 3, reducing the height of the valve rod 3 relative to the valve clack 4, and further compressing the spring element 5 arranged at the bottom of the hole 42 to generate larger spring force, in this case, in order to enable the valve clack 4 to be lifted under the pushing of the pressure of the medium flowing through the position of the valve seat through hole 14 and keep the continuously-opened state, the medium flowing through the valve seat through hole 14 needs to have larger pressure, so that the purpose of increasing the valve pressure value of the low-temperature check valve is achieved; conversely, when the valve pressure value of the low temperature check valve needs to be reduced, the adjusting screw 72 can be reversely rotated when the low temperature check valve is in the closed state, so that the lower end of the adjusting screw 72 moves upwards along with the reverse rotation of the adjusting screw, at the moment, the valve rod 3 is not propped against the lower end of the adjusting screw 72, the spring element 5 in the compressed state is released to a certain extent, the adjusting screw 72 is sprung upwards under the action of the spring element 5, the height of the valve rod 3 relative to the valve clack 4 is increased, the spring force generated by the spring element 5 is reduced, and in this case, in order to enable the valve clack 4 to be lifted and kept in the continuously-opened state under the pushing of the pressure of the medium flowing through the position of the valve seat through hole 14, the required medium pressure flowing through the valve seat through hole 14 is reduced, so that the purpose of reducing the valve pressure value of the low temperature check valve is achieved.
In the above preferred embodiment, as shown in fig. 4, in order to facilitate the rotation of the adjusting screw 72 by the operator, the tip of the adjusting screw 72 is provided with an adjusting handle 73.
Further, the adjustment handle 73 may be configured as a short bar disposed perpendicular to the adjustment screw 72; or may be configured as two mutually perpendicular stubs perpendicular to the adjustment screw 72; or may be configured as a disc disposed on the adjusting screw 72, the center of which is penetrated by the central axis of the adjusting screw 72.
Further, as shown in fig. 5, in the above preferred embodiment, in order to avoid unnecessary rotation of the small diameter portion 32 when the hole 42 of the valve flap 4 is moved up and down, a set of guide ribs 321 and guide grooves 421 are respectively provided on the outer side wall surface of the small diameter portion 32 and the inner side wall surface of the hole 42.
Alternatively, the outer side wall surface of the small diameter portion 32 and the inner side wall surface of the hole 42 are respectively provided with a plurality of sets of guide ribs 321 and guide grooves 421.
Preferably, in order to facilitate the assembly between the valve stem 3 and the valve clack 4, a guiding rib is disposed on the outer side wall surface of the small diameter portion 32, and a plurality of guiding grooves matched with the guiding rib are disposed on the inner side wall surface of the hole 42, and when the small diameter portion 32 is inserted into the hole 42, the guiding rib can be inserted into any guiding groove.
In addition, in order to prevent the adjusting screw 72 from excessively rotating reversely and thus being separated from the adjusting nut 71, the bottom of the adjusting screw 72 is rotatably connected with the top end of the large diameter portion 31 of the valve rod, and when the adjusting screw 72 continuously rotates reversely so that the valve rod 3 is continuously lifted up until the top surface of the large diameter portion 31 thereof abuts against the bottom surface of the valve cover 2, the valve rod 3 cannot move upwardly any more due to the restriction of the valve cover 2, and the adjusting screw 72 rotatably connected with the valve rod 3 cannot move upwardly any more, thereby avoiding the occurrence of separation from the adjusting nut 71.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. An adjustable low-temperature check valve is characterized by comprising a valve body, a valve cover, a valve rod, a valve clack and an adjusting mechanism, wherein,
the valve body is internally provided with a liquid inlet channel and a liquid outlet channel, and the liquid inlet channel is communicated with the liquid outlet channel through a valve seat through hole formed in the valve seat;
the valve cover covers the upper opening of the valve body;
the valve rod is arranged in the valve body and comprises a large-diameter part and a small-diameter part, the top end of the large-diameter part is connected with the adjusting mechanism, the outer diameter size of the valve rod is matched with the inner diameter size of an opening above the valve body, and the small-diameter part extends into a hole of the valve clack and is connected with the valve clack in a sliding mode along the axial direction;
the bottom of the valve clack is provided with a sealing gasket matched with the valve seat through hole, and an elastic element in a compression state is arranged between the valve rod and the valve clack;
the lower part of the adjusting mechanism penetrates through the valve cover to be connected with the large-diameter part of the valve rod, and the adjusting mechanism is used for adjusting the height of the valve rod relative to the valve clack.
2. The low temperature check valve of claim 1, wherein the elastic element is a spring element, the spring element is sleeved on the small diameter portion of the valve rod and the upper portion of the valve clack, two ends of the spring element respectively prop against the bottom surface of the large diameter portion and the shoulder portion of the valve clack, and when the check valve is in a closed state, the spring element is in a compressed state.
3. The low temperature check valve of claim 1, wherein the elastic element is a spring element, the spring element is disposed at a bottom of the hole of the valve flap, two ends of the spring element respectively abut against a bottom surface of the small diameter portion and a bottom surface of the hole, and the spring element is in a compressed state when the check valve is in a closed state.
4. A low temperature check valve as claimed in claim 2 or 3, wherein the adjustment mechanism comprises an adjustment nut and an adjustment screw, the adjustment nut is fixed above the valve cover, the adjustment screw is in threaded connection with the adjustment nut, and the lower end of the adjustment screw passes through the valve cover and abuts against the upper surface of the large diameter part of the valve rod; when the adjusting screw is rotated, the lower end of the adjusting screw moves downwards along with the rotation of the adjusting screw, so that the valve rod moves downwards, and a spring element arranged between the valve rod and the valve clack is further compressed; when the adjusting screw is rotated in the reverse direction, the lower end of the adjusting screw moves upward with the reverse rotation thereof, the spring member in the compressed state is released, and the valve stem moves upward.
5. The low temperature check valve of claim 4, wherein the top end of the adjusting screw is provided with an adjusting handle.
6. The low temperature check valve of claim 4, wherein an annular groove is formed in an inner side wall surface of the opening above the valve body, a V-shaped sealing ring is arranged in the annular groove, the V-shaped sealing ring comprises a support ring, an elastic sealing ring and a compression ring which are overlapped, and the number of the elastic sealing rings is a plurality of, and the elastic sealing rings are clamped between the support ring and the compression ring.
7. The low temperature check valve according to claim 6, wherein the lower part of the valve cover is provided with an annular boss, the annular boss is matched with the annular groove, an outer annular groove is respectively formed on the outer side wall surface of the annular boss and the outer side wall surface of the large diameter part of the valve rod, and an O-shaped sealing ring is arranged in the outer annular groove.
8. A low temperature check valve according to claim 2 or claim 3, wherein an annular flange is provided around the underside of the flap to engage the gasket.
9. The low-temperature check valve according to claim 8, wherein the bottom of the valve clack further comprises a valve clack rod extending along the central axis direction of the valve clack, the valve clack rod is sequentially sleeved with an annular low-temperature sealing gasket and an annular gland from top to bottom and is fastened by a fastening nut, and the outer diameter of the annular gland is smaller than the aperture of the valve seat through hole.
10. The low temperature check valve of claim 9, wherein an inner side of the annular low temperature packing and an outer side of the annular gland are provided with mutually mating inclined surfaces, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223565674.5U CN219139931U (en) | 2022-12-30 | 2022-12-30 | Adjustable low-temperature check valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223565674.5U CN219139931U (en) | 2022-12-30 | 2022-12-30 | Adjustable low-temperature check valve |
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| Publication Number | Publication Date |
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| CN219139931U true CN219139931U (en) | 2023-06-06 |
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| CN202223565674.5U Active CN219139931U (en) | 2022-12-30 | 2022-12-30 | Adjustable low-temperature check valve |
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| CN (1) | CN219139931U (en) |
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| CP03 | Change of name, title or address |
Address after: Room 507, 5th Floor, Railway Port Comprehensive Service Building, Urumqi International Land Port Area, No. 416 Jinyang Road, Urumqi Economic and Technological Development Zone (Toutunhe District), Urumqi, Xinjiang Uygur Autonomous Region, 830000, China Patentee after: Meike Shunjie Supply Chain Services Co.,Ltd. Address before: Room 507, 5th Floor, Railway Port Comprehensive Service Building, No. 416 Jinyang Road, Urumqi Economic and Technological Development Zone (Toutunhe District), Urumqi City, Xinjiang Uygur Autonomous Region, 830000 Patentee before: Xinjiang Meike Shunjie Supply Chain Service Co.,Ltd. |
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