Venturi drain valve with nozzle capable of being cleaned online

Abstract

The utility model relates to the technical field of drain valves, in particular to a venturi drain valve capable of cleaning a nozzle on line, which comprises a valve body and a venturi nozzle, the venturi nozzle is obliquely or straightly arranged in the valve body, and a nozzle flow channel is arranged in the venturi nozzle; an online cleaning mechanism used for cleaning a nozzle runner is arranged at the position, corresponding to the Venturi nozzle, of the valve body, the online cleaning mechanism comprises a gland, a probe assembly and a sealing assembly, the gland is in threaded connection to the valve body, and an axial mounting hole is formed in the center of the gland; the probe assembly is movably connected into the axial mounting hole, and the bottom end of the probe assembly can extend into the nozzle runner for dredging; and the sealing assembly is arranged between the probe assembly and the axial mounting hole. According to the utility model, the online cleaning mechanism is arranged, so that the problems that a small-displacement Venturi nozzle is easy to block, needs to be shut down for maintenance and is short in sealing service life are effectively solved, the scale deposited in the nozzle can be removed under the condition that the operation is not interrupted, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a hydrophobic valve technical field, especially a kind of venturi hydrophobic valve of nozzle online cleaning. BACKGROUND

[0002] Venturi steam trap is a kind of new type hydrophobic valve without air block and steam lock and can meet the function of steam drainage, and venturi steam trap is a kind of steam hydrophobic valve without opening and closing element, to make it achieve the function of steam drainage.

[0003] Generally, small-displacement venturi hydrophobic valve will cause water accumulation due to small venturi nozzle flow passage, which will accelerate the corrosion of steam equipment or steam pipeline inner wall, and the rust and other impurities caused by corrosion will gradually accumulate in the water jet flow passage during the hydrophobic process of hydrophobic valve, thereby causing nozzle flow passage to be blocked, and further causing abnormal hydrophobic.

[0004] Traditional solutions need to be stopped to disassemble and clean the hydrophobic valve, which not only affects the continuity of production, but also has high maintenance cost, and the patent with publication number CN219550244U discloses a venturi steam trap with dredging function, which mainly realizes self-cleaning by self-rotation of filter screen, but in actual application process, filter screen needs to be removed after filtering, and in long-term operation, there is still the risk of seal failure caused by filter screen wear. UTILITY MODEL CONTENT

[0005] In order to solve the technical defects proposed in the above background art, the purpose of the utility model is to provide a venturi hydrophobic valve capable of online cleaning nozzle, especially suitable for small-displacement and easily blocked venturi hydrophobic valve, to solve the technical problems of traditional equipment needing to be stopped for cleaning and short seal life.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A venturi hydrophobic valve capable of online cleaning nozzle, comprising a valve body and a venturi nozzle, the venturi nozzle is arranged obliquely or straightly in the valve body, and the venturi nozzle is provided with a nozzle flow passage; the valve body is provided with an online cleaning mechanism for cleaning the nozzle flow passage at the position corresponding to the venturi nozzle, the online cleaning mechanism comprises a gland, a probe assembly and a sealing assembly, the gland is threadedly connected to the valve body, and an axial mounting hole is formed in the center of the gland; the probe assembly is movably connected in the axial mounting hole, and the bottom end of the probe assembly can extend into the nozzle flow passage for dredging; the sealing assembly is arranged between the probe assembly and the axial mounting hole, and the sealing assembly is used to block the probe assembly in the gland.

[0008] Preferably, the probe assembly comprises a probe, a screw plug and a reset member, the probe is fixed to the gland by the screw plug, and the probe can reciprocate along the nozzle flow channel by rotating the screw plug or the reset member; the screw plug is connected to the top end of the gland, and the inner wall of the screw plug is provided with a threaded groove; the reset member is a spring, which is arranged in the screw plug and pushes the probe to reset automatically.

[0009] Preferably, the sealing assembly comprises a sealing ring, a clamping ring, a gasket and a packing ring, the sealing ring is installed at the bottom end of the gland by the clamping ring; the gasket is connected between the screw plug and the packing ring, and is used for limiting the position of the packing ring; the vertical section of the packing ring is in a V-shaped structure, and the packing ring is filled in the axial installation hole between the gasket and the clamping ring.

[0010] Preferably, the probe is in a conical or spiral structure near the head of the Venturi nozzle, and the diameter of the probe gradually increases along the head to form a stepped shaft structure; the tail of the probe can be connected to a driving member to drive the probe to move up and down in the nozzle flow channel.

[0011] Preferably, the valve body is provided with a water inlet and a water outlet at two ends respectively, the water inlet and the water outlet are in a horn-shaped structure, and flange interfaces are connected to the end portions of the water inlet and the water outlet.

[0012] Preferably, a flow guide channel is communicated between the water inlet and the water outlet in the valve body, the flow guide channel comprises a flow guide groove and a flow guide vertical hole, the flow guide groove is arranged in an inclined structure, one end of the flow guide groove is communicated with the water inlet, and the other end is blocked by a sealing cover; the flow guide vertical hole is perpendicular to the flow guide groove, and one end of the flow guide vertical hole is communicated with the water outlet through the Venturi nozzle.

[0013] Preferably, a filter screen cover is further arranged in the flow guide groove, the filter screen cover is in a stainless steel cylindrical structure, and a plurality of filter holes are formed in the circumferential side of the filter screen cover.

[0014] Preferably, gaskets are arranged at the connection positions of the valve body, the gland and the Venturi nozzle.

[0015] In summary, the beneficial effects of the utility model are as follows:

[0016] The Venturi drain valve provided by the utility model effectively solves the problems of easy blockage, maintenance during shutdown and short sealing life of the small-displacement Venturi nozzle, enables the nozzle to remove the dirt accumulated in the nozzle without interrupting operation, enables the nozzle to remove the dirt accumulated in the nozzle without interrupting operation, only needs to push or rotate the probe assembly to make it enter the nozzle flow channel to remove the impurities when the online cleaning mechanism is used to dredge the nozzle flow channel, and the probe assembly can be automatically reset in time after being loosened, thereby avoiding the problems of interference with normal drainage and steam erosion and reducing the requirement for manual intervention, and the sealing assembly is used for multi-stage sealing, which not only has the effect of separating the slag, but also reduces the damage of temperature fluctuation to the probe assembly, thereby prolonging the service life of the sealing assembly. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure diagram of the Venturi drain valve with online nozzle cleaning function of the utility model;

[0018] Figure 2 is a partial sectional view of the online cleaning mechanism in the utility model;

[0019] Figure 3 is a sectional view of the Venturi drain valve with online nozzle cleaning function of the utility model;

[0020] Figure 4 is a working state diagram of the Venturi drain valve with online nozzle cleaning function of the utility model, wherein the arrow indicates the water flow direction.

[0021] Explanation of reference numerals in the drawings:

[0022] 1, valve body; 11, water inlet; 12, water outlet; 2, Venturi nozzle; 21, nozzle flow channel; 3, online cleaning mechanism; 31, gland; 311, axial mounting hole; 32, probe assembly; 321, probe; 322, plug; 323, reset member; 33, sealing assembly; 331, sealing ring; 332, clamping ring; 333, gasket; 334, packing ring; 4, flange interface; 5, flow guide channel; 51, flow guide groove; 52, flow guide vertical hole; 6, sealing cover; 7, filter screen cover; 8, gasket. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art belong to the protection scope of the utility model.

[0024] Those skilled in the art shall understand that in the disclosure of the utility model, the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as a limitation on the utility model.

[0025] In the description of the utility model, if there is a word such as "several" description, its meaning is one or more, the meaning of multiple is two and more, greater than, less than, more than and the like are not included in the number, above, below, within and the like are understood as including the number. If the first, second, third is described, it is only used for distinguishing technical features for the purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0026] The following will be described in detail in combination with the accompanying drawings Figures 1-4 The embodiment of the utility model discloses a venturi drain valve with online nozzle cleaning, which will be further described in detail.

[0027] A venturi drain valve with online nozzle cleaning, as shown in Figure 1 , 2 , comprises a valve body 1 and a venturi nozzle 2, the venturi nozzle 2 is arranged obliquely in the valve body 1, and the venturi nozzle 2 is internally provided with a nozzle flow channel 21; the valve body 1 is provided with an online cleaning mechanism 3 for cleaning the nozzle flow channel 21 at the position corresponding to the venturi nozzle 2, the online cleaning mechanism 3 comprises a gland 31, a probe 321 assembly 32 and a sealing assembly 33, the gland 31 is screw-connected on the valve body 1, and an axial mounting hole 311 is formed in the center of the gland 31; the probe 321 assembly 32 is movably connected in the axial mounting hole 311, and the bottom end of the probe 321 assembly 32 can extend into the nozzle flow channel 21 for dredging; the sealing assembly 33 is arranged between the probe 321 assembly 32 and the axial mounting hole 311, and the sealing assembly 33 is used for sealing the probe 321 assembly 32 in the gland 31.

[0028] Specifically, the probe 321 assembly 32 includes the probe 321, the screw plug 322 and the reset member 323. The probe 321 is fixed to the gland 31 through the screw plug 322, and the probe 321 can reciprocate along the nozzle flow channel 21 by rotating the reset member 323 or the screw thread. The screw plug 322 is provided with a spring chamber, and the screw plug 322 is clamped to the top end of the gland 31. The inner wall of the screw plug 322 is further provided with a threaded groove, and the probe 321 can be screwed with the screw plug 322 through the threaded groove. The reset member 323 is a spring, which is arranged in the spring chamber and sleeved on the outer surface of the probe 321. The probe 321 is automatically reset by the elastic force of the spring. The length of the head of the probe 321 close to the Venturi nozzle 2 is greater than the length of the nozzle flow channel 21, so that the protruding section of the head completely covers the blocked area of the nozzle flow channel 21. The head of the probe 321 is in clearance fit with the nozzle flow channel, so as to facilitate the probe 321 to quickly extend into the nozzle flow channel 21. The diameter of the probe 321 gradually increases along the head to form a stepped shaft structure, so as to adapt to the structure of the axial mounting hole 311 of the gland 31 and complete the multi-stage sealing effect together with the sealing assembly 33.

[0029] It is worth mentioning that the head of the probe 321 can be replaced by a spiral scraper structure, which can scrape off the viscous dirt in the nozzle flow channel 21 to improve the cleaning efficiency.

[0030] In the embodiment, as shown in Figure 3 the sealing assembly 33 includes a sealing ring 331, a clamping ring 332, a gasket 333 and a packing ring 334. The sealing ring 331 is installed at the bottom end of the gland 31 through the clamping ring 332. The gasket 333 is clamped between the screw plug 322 and the packing ring 334, which is used to limit the position of the packing ring 334. The vertical section of the packing ring 334 is in V-shaped structure, and the packing ring 334 is filled in the axial mounting hole 311 between the gasket 333 and the clamping ring 332.

[0031] In order to ensure the sealing performance when the nozzle flow channel 21 is cleaned online, two-stage sealing is arranged in the valve body 1 and the gland 31, wherein the first stage sealing is composed of the gasket 8, the sealing ring 331 and the clamping ring 332, the sealing ring 331 is made of modified polytetrafluoroethylene and is fixed by the clamping ring 332 made of 316L stainless steel, and can withstand high temperature below 200 DEG C; the gasket 8 is made of stainless steel graphite composite material and is arranged at the connection between the valve body 1 and the gland 31 and the connection between the valve body 1 and the venturi nozzle 2; the gasket 8 is used to seal the venturi nozzle 2 and the gland 31, and the sealing ring 331 and the clamping ring 332 are used to seal the connection between the probe 321 and the gland 31, so that the steam condensate is prevented from leaking along the thread, and the effects of plane sealing and slag separation are realized; the second stage sealing is a V-shaped packing ring 334 with spring compensation, the V-shaped packing ring 334 is made of RPTFE material, so that the self-tightening effect can be generated under the steam pressure of 1 MPa, and the gasket 333 is used to form high-temperature sealing; meanwhile, the V-shaped packing ring 334 is filled between the spring and the probe 321, so that the steam is prevented from directly entering the axial installation hole 311 after the probe 321 is reset, and the corrosion problem caused by the steam washing the spring and the probe 321 is prevented, so that the service life of the probe 321 and the spring is prolonged, and long-term maintenance-free sealing is realized.

[0032] In the embodiment, as shown in Figure 1 both ends of the valve body 1 are provided with the water inlet 11 and the water outlet 12, the water inlet 11 and the water outlet 12 are in a horn structure, and the flange interface 4 is connected to the end of the water inlet 11 and the water outlet 12.

[0033] Specifically, the flange interface 4 can facilitate the quick connection of the steam trap to the working equipment, and the water inlet 11 and the water outlet 12 at both ends of the valve body 1 are in a horn structure, which is to increase the water flow of the steam condensate entering the steam trap, so as to improve the steam trap efficiency.

[0034] In the embodiment, as shown in Figure 2 the valve body 1 is communicated with the flow guide channel 5 between the water inlet 11 and the water outlet 12, the flow guide channel 5 includes the flow guide groove 51 and the flow guide vertical hole 52, the flow guide groove 51 is in an inclined structure, one end of the flow guide groove 51 is communicated with the water inlet 11, and the other end is blocked by the sealing cover 6; the flow guide vertical hole 52 is perpendicular to the flow guide groove 51, and one end of the flow guide vertical hole 52 is communicated with the water outlet 12 through the venturi nozzle 2.

[0035] Specifically, the tilt angle of the guide channel 51 can be adjusted between 30° and 60° to adapt to different flow requirements; the guide vertical hole is vertically connected to the guide channel 51 and the Venturi nozzle 2 to form a Venturi effect, so that when the condensate flows through the nozzle channel 21 at high speed, the steam is blocked due to the pressure difference; and the diameter of the guide vertical hole is larger than the diameter of the Venturi nozzle 2, thereby ensuring that there is still 50% flow area during unblocking to maintain basic drainage function.

[0036] In this embodiment, as Figure 3 As shown, a filter screen 7 is also installed inside the flow channel 51. The filter screen 7 is a stainless steel cylindrical structure, and multiple filter holes are opened on the periphery of the filter screen 7.

[0037] Specifically, the filter screen 7 can perform preliminary filtration of steam condensate and intercept larger impurities to prevent them from clogging the nozzle flow channel 21 inlet of the Venturi nozzle 2, thus reducing nozzle blockage; and the filter screen can be removed by opening the sealing cover 6, which facilitates quick replacement of the filter screen.

[0038] It is worth noting that the online cleaning mechanism 3 has two cleaning modes: manual and automatic. In manual mode, a handle for easy operation can be installed at the tail of the probe 321. By axially pushing or pressing the handle, the smaller diameter part of the probe 321 is inserted into and penetrates the nozzle flow channel 21 under the action of thrust, thus clearing the nozzle flow channel 21. When the probe 321 is released, it begins to reset under the elastic action of the spring. In automatic mode, a differential pressure sensor can be installed inside the valve body 1, located within the guide channel 5. The differential pressure sensor detects the pressure difference between the inlet 11 and the outlet 12. When the pressure difference is greater than 0.2 MPa, a signal is sent to the drive unit connected to the tail of the probe 321. The drive unit then controls the probe 321 to move axially along the threaded groove on the inner wall of the plug 322, allowing the probe 321 to automatically extend into the nozzle flow channel 21 to complete the clearing action. After cleaning, the drive unit drives the probe 321 to retract and reset, thus achieving automatic cleaning.

[0039] like Figure 3 , 4 As shown, the working principle of the Venturi steam trap with online nozzle cleaning capability of this utility model is as follows:

[0040] First, when normal hydrophobic, steam condensate water flows into the guide channel 5 from the water inlet 11, and under the action of the obliquely arranged guide groove 51, it is preliminarily filtered through the filter cover and then enters the guide vertical hole 52, then it passes through the nozzle flow channel 21 at high speed and realizes the drainage of blocking steam by using Bernoulli effect, and finally it is discharged from the water outlet 12; wherein the probe 321 is located above the venturi nozzle 2 under the action of the reset member 323 and does not interfere with the hydrophobic flow channel; and when the hydrophobic valve needs to be cleaned after being used for a certain period of time, the tail of the probe 321 is pushed or pressed axially to drive the head of the probe 321 to extend into the nozzle flow channel 21 of the venturi nozzle 2, and then the impurities clogging or adhering to the inner wall of the nozzle flow channel 21 are removed; and then the nozzle flow channel 21 is dredged, and after cleaning, the probe 321 is loosened so that it is withdrawn from the flow channel and reset to the initial position under the action of the spring, and the whole process does not need to be stopped for cooling and pressure relief and then manually disassembled and cleaned, so that the nozzle flow channel 21 is maintained without stopping and the need for manual intervention is reduced.

[0041] The embodiments of the specific implementation are the preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A venturi trap with online cleanable nozzle comprising a valve body and a venturi nozzle, characterized in that, The Venturi nozzle is arranged in the valve body in an inclined or straight manner, and the Venturi nozzle is internally provided with a nozzle flow channel; the valve body is provided with an online cleaning mechanism for cleaning the nozzle flow channel at a position corresponding to the Venturi nozzle, the online cleaning mechanism comprises a gland, a probe assembly and a sealing assembly, the gland is threadedly connected to the valve body, and an axial mounting hole is formed in the center of the gland; the probe assembly is movably connected in the axial mounting hole, and the bottom end of the probe assembly can extend into the nozzle flow channel for dredging; the sealing assembly is arranged between the probe assembly and the axial mounting hole, and is used for sealing the probe assembly in the gland.

2. The online cleanable nozzle venturi trap of claim 1, wherein, The probe assembly comprises a probe, a screw plug and a reset member, the probe is fixed to the gland through the screw plug, and the probe can reciprocate along the nozzle flow channel through the reset member or threaded rotation; the screw plug is clamped at the top end of the gland, and a threaded groove is formed in the inner wall of the screw plug; the reset member is a spring, which is arranged in the screw plug and pushes the probe to automatically reset.

3. The online cleanable nozzle venturi trap of claim 1, wherein, The sealing assembly comprises a sealing ring, a clamping ring, a gasket and a packing ring, the sealing ring is mounted at the bottom end of the gland through the clamping ring; the gasket is clamped between the screw plug and the packing ring, and is used for limiting the position of the packing ring; the vertical section of the packing ring is in a V-shaped structure, and the packing ring is filled in the axial mounting hole between the gasket and the clamping ring.

4. The online cleanable nozzle venturi trap of claim 2, wherein, The head of the probe close to the Venturi nozzle is in a conical or spiral structure, and the diameter of the probe gradually increases along the head to form a stepped shaft structure; the tail of the probe can be externally connected to a driving member to drive the probe to move up and down along the nozzle flow channel.

5. The online cleanable nozzle venturi trap of claim 1, wherein, The valve body is provided with a water inlet and a water outlet at two ends respectively, the water inlet and the water outlet are in a horn-shaped structure, and flange interfaces are connected to the end portions of the water inlet and the water outlet.

6. The online cleanable nozzle venturi trap of claim 5, wherein, A flow guide channel is communicated between the water inlet and the water outlet in the valve body, the flow guide channel comprises a flow guide groove and a flow guide vertical hole, the flow guide groove is arranged in an inclined structure, one end of the flow guide groove is communicated with the water inlet, and the other end is sealed by a sealing cover; the flow guide vertical hole is arranged vertically to the flow guide groove, and one end of the flow guide vertical hole is communicated with the water outlet through the Venturi nozzle.

7. The online cleanable nozzle venturi trap of claim 6, wherein, A filter screen cover is further arranged in the flow guide groove, the filter screen cover is in a stainless steel cylindrical structure, and a plurality of filter holes are formed in the circumferential side of the filter screen cover.

8. The online cleanable nozzle venturi trap of claim 1, wherein, Gaskets are arranged at the connection positions of the valve body, the gland and the Venturi nozzle.

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