Drain valve with bypass

Abstract

The utility model relates to the technical field of flow regulation of drain valves, in particular to a drain valve with a bypass, which comprises a valve body, a valve core component arranged in the valve body and an operation component used for controlling the valve core component to open and close, the valve core component comprises a valve ball, a stop block and a screw plug, and a V-shaped runner is arranged on the valve ball. The valve ball is movably connected between the screw plug and the stop block; one end of the check block is fixed to the inner wall of the valve body, the other end of the check block is connected with the screw plug, and a first runner is formed in the center of the check block. A second flow channel is formed in the screw plug, the second flow channel and the first flow channel are located on the same axis, and at least one drainage module is arranged in the second flow channel and the first flow channel; the first flow channel and the second flow channel converge and communicate on the right side of the valve ball; the V-shaped flow channel is formed in the valve ball in the valve body, so that the valve ball can be switched to different flow channels by rotating the position of the valve ball, different drainage states can be switched according to different production working conditions, and the drainage effect is better improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam trap flow regulation, and particularly relates to a steam trap with a bypass. Background Technique

[0002] A steam trap is the abbreviation of a steam trap, and its function is to automatically discharge steam condensate and non-condensable gases such as air in a heating device or a steam pipeline without leaking steam. Since the steam trap has the function of blocking steam and discharging water, it can make the steam heating device heat evenly, make full use of the latent heat of steam, and prevent water hammer from occurring in the steam pipeline.

[0003] Regarding the existing steam trap, bypass or cut-off operations are still required during its use. Therefore, it is necessary to add a bypass pipeline and a cut-off valve to the external pipeline in advance. When it is necessary to change the state inside the steam trap, it is necessary to accurately find the pipeline corresponding to the cut-off valve or the bypass valve, and then turn on the cut-off valve or the bypass valve. Moreover, there is a certain installation space between the cut-off valve and the bypass valve and the steam trap during installation. Therefore, when performing cut-off and bypass operations, it is necessary to walk to the corresponding valve to close the valve.

[0004] It can be seen that the existing steam trap configuration not only has a large initial investment and a large volume of the valve group, but also has problems such as cumbersome operations for adjusting the cut-off state and bypass state of the steam trap; and when the steam trap fails to effectively discharge condensate during the production process, the condensate cannot be discharged by opening the bypass cut-off valve, thereby affecting production efficiency. Content of the Utility Model

[0005] In order to solve the technical defects mentioned in the above background technique, the purpose of the utility model is to provide a steam trap with a bypass. This hydrophobic structure not only reduces the volume of the steam trap group, but also reduces the installation cost and the heat preservation cost; it makes the maintenance of the steam trap simple and convenient, and has a good hydrophobic effect.

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

[0007] A steam trap with a bypass includes a valve body, a spool assembly arranged inside the valve body, and an operating assembly for controlling the opening and closing of the spool assembly. The spool assembly includes a valve ball, a stop block, and a plug. The valve ball is provided with a V-shaped flow channel, and the valve ball is movably connected between the plug and the stop block; one end of the stop block is fixed to the inner wall of the valve body, and the other end is connected to the plug, and a first flow channel is opened in the center of the stop block; a second flow channel is opened on the plug. The second flow channel and the first flow channel are located on the same axis, and at least one hydrophobic module is arranged in the second flow channel and the first flow channel; the first flow channel and the second flow channel converge and communicate on the right side of the valve ball; by rotating the position of the valve ball, different flow channels and hydrophobic states are switched:

[0008] When the valve ball rotates to the V-shaped flow channel and connects with the first flow channel, the second flow channel is in a closed state, and the fluid flows from the water inlet through the valve ball to the rear first flow channel, and flows out from the water outlet after passing through the hydrophobic module;

[0009] When the valve ball rotates to the V-shaped flow channel and is connected to the second flow channel, the first flow channel is in a closed state, and the fluid flows from the water inlet through the valve ball to the second flow channel, and flows out from the water outlet after passing through the hydrophobic module, achieving a bypass function;

[0010] When the valve body is closed, the V-shaped flow channel is not connected with the first flow channel and the second flow channel, and the fluid flowing in from the water inlet is blocked in the V-shaped flow channel of the valve ball, thereby achieving a cut-off function.

[0011] Preferably, a hollow cavity is provided in the valve body, and a plurality of openings connected to the hollow cavity are provided around the valve body, wherein the openings on the left and right sides of the valve body are configured as a water inlet and a water outlet, and the openings on the front and rear sides are connected to valve covers, and a sealing gasket is provided between the valve cover and the valve body.

[0012] Preferably, a groove is formed at one end of the valve ball, and the operating assembly is rotatably connected to the valve ball via the groove.

[0013] Preferably, sealing valve seats are provided at the contact points between the valve ball, the stopper and the screw plug respectively.

[0014] Preferably, a spacer is provided between the screw plug, the valve body and the stopper.

[0015] Preferably, the trap module is one of a thermodynamic trap module, a membrane box trap module, a bimetallic trap module or a Venturi trap module.

[0016] Preferably, the operating assembly includes a valve stem, a connecting plate and an actuator; the lower portion of the valve stem is connected to the valve ball, a valve stem sealing assembly is connected between the middle portion of the valve stem and the valve body, and the upper portion of the valve stem is transmission-connected to the actuator; under the drive of the actuator, the valve stem drives the valve ball to rotate to open or close the steam trap.

[0017] Preferably, the valve stem sealing assembly includes a sealing valve cover, a spring compensator and a sealing ring; the sealing valve cover is connected to the valve body by threads; the spring compensator is arranged between the sealing valve cover and the valve body, and the spring compensator is sleeved on the outer side surface of the valve stem; the sealing ring is arranged and sleeved at the connection between the valve stem and the valve body.

[0018] Preferably, the connecting plate is a U-shaped structure composed of a plurality of plates spliced together, and one end of the connecting plate is fixed to the valve body by a round nut.

[0019] Preferably, the actuator is a manual handwheel, an electric actuator or a pneumatic actuator.

[0020] In summary, the beneficial effects of the present utility model are as follows:

[0021] The steam trap with a bypass of the present utility model is provided with a valve ball in the valve body, and by using the V-shaped flow channel opened on the valve ball, it can switch to different flow channels by rotating the position of the valve ball, thereby realizing the rapid adjustment of the state of the steam trap; and different steam trap modules can be installed in the flow channel according to different production conditions, so that different steam trap states can be switched, and the steam trap effect can be better improved; in addition, the present utility model not only reduces the volume of the steam trap group, but also reduces the installation cost and the heat preservation cost; the maintenance of the steam trap is simple and convenient, and the maintenance cost is low. Description of the Drawings

[0022] Figure 1 is the top view of the steam trap with a bypass of the present utility model;

[0023] Figure 2 is Figure 1 the vertical sectional view of the A-A plane in

[0024] Figure 3 is the working schematic diagram of the steam trap with a bypass of the present utility model in the steam trap state;

[0025] Figure 4 is the working schematic diagram of the steam trap with a bypass of the present utility model in the bypass state;

[0026] Figure 5 is the working schematic diagram of the steam trap with a bypass of the present utility model in the cut-off state;

[0027] Figure 6 is the structural schematic diagram of the steam trap with a bypass of the present utility model adopting a thermodynamic steam trap module.

[0028] 1. Valve body; 11. Hollow cavity; 12. Water inlet; 13. Water outlet; 14. Valve cover; 15. Sealing gasket; 2. Spool assembly; 21. Valve ball; 211. V-shaped flow channel; 212. Groove; 22. Block; 221. First flow channel; 23. Plug; 231. Second flow channel; 24. Sealing valve seat; 25. Spacer block; 3. Operating assembly; 31. Valve rod; 32. Connecting plate; 33. Actuating driver; 4. Steam trap module; 5. Valve rod sealing assembly; 51. Sealing valve cover; 52. Spring compensator; 53. Sealing ring. Detailed Implementation Modes

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0030] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationship indicated by the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0031] In addition, the terms "installed", "set up", "provided with", "connected", "connected to" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is internal communication between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] In the description of the present utility model, if there are words such as "a number of" for description, its meaning is one or more, and the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the present number, and understandings such as above, below, within, etc. include the present number. If there is a description of first, second, third, etc., it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0033] The following will further describe in detail an embodiment of a steam trap with a bypass in the present utility model in conjunction with the attached Figures 1-6 drawings.

[0034] A steam trap with a bypass, as Figures 1 to 5As shown in the figure, it includes a valve body 1, a spool assembly 2 arranged inside the valve body 1, and an operating assembly 3 for controlling the opening and closing of the spool assembly 2. The spool assembly 2 includes a valve ball 21, a stop block 22, and a plug 23. A V-shaped flow channel 211 is formed on the valve ball 21, and the valve ball 21 is movably connected between the plug 23 and the stop block 22. One end of the stop block 22 is fixed to the inner wall of the valve body 1, and the other end is connected to the plug 23. A first flow channel 221 is formed at the center of the stop block 22. A second flow channel 231 is formed on the plug 23. The second flow channel 231 and the first flow channel 221 are on the same axis, and at least one hydrophobic module 4 is arranged in the second flow channel 231 and the first flow channel 221. The first flow channel 221 and the second flow channel 231 converge and communicate on the right side of the valve ball 21. By rotating the position of the valve ball 21, different flow channels and hydrophobic states can be switched:

[0035] When the valve ball 21 rotates until the V-shaped flow channel 211 communicates with the first flow channel 221, the second flow channel 231 is in a closed state. The fluid flows from the water inlet 12 through the valve ball 21 into the first flow channel 221 at the rear, and flows out from the water outlet 13 after passing through the hydrophobic module 4.

[0036] When the valve ball 21 rotates until the V-shaped flow channel 211 communicates with the second flow channel 231, the first flow channel 221 is in a closed state. The fluid flows from the water inlet 12 through the valve ball 21 into the second flow channel 231, and flows out from the water outlet 13 after passing through the hydrophobic module 4, achieving the bypass function.

[0037] When the valve body 1 is closed, the V-shaped flow channel 211 does not communicate with the first flow channel 221 and the second flow channel 231. The fluid flowing in from the water inlet 12 is blocked in the V-shaped flow channel 211 of the valve ball 21, achieving the cut-off function.

[0038] Specifically, in the present utility model, the original straight flow channel in the ball valve is changed to a V-shaped flow channel 211, so as to realize the switching of flow channels in two directions on a single ball valve, and then form a completely non-connecting flow channel to complete the cut-off. By installing a hydrophobic module 4 above one of the flow channels, the normal hydrophobic function of the hydrophobic valve is ensured. The other flow channel directly forms a bypass. The hydrophobic module 4 can be connected to the first flow channel 221 or the second flow channel 231 by threads, or can be installed in both the first flow channel 221 and the second flow channel 231 at the same time. It mainly switches different hydrophobic modules 4 according to the change of the production process for hydrophobic treatment.

[0039] Such as Figures 3-5As shown, the arrow direction is the fluid flow direction. When switching different flow channels, the operation component 3 above the valve body 1 drives the valve ball 21 to rotate, so that the V-shaped flow channel 211 on the valve ball 21 rotates in a preset direction, so that the V-shaped flow channel 211 communicates with the first flow channel 221 or the second flow channel 231, or may not communicate with the first flow channel 221 or the second flow channel 231, so that the steam trap satisfies the functions of draining water, bypassing, and shutting off.

[0040] In this embodiment, as Figure 1 , 2 shown, a hollow cavity 11 is provided in the valve body 1, and a plurality of openings communicating with the hollow cavity 11 are provided around the valve body 1. The openings located on the left and right sides of the valve body 1 are set as the water inlet 12 and the water outlet 13, and valve covers 14 are connected to the openings on the front and rear sides. A sealing gasket 15 is provided between the valve cover 14 and the valve body 1.

[0041] Specifically, the hollow cavity 11 in the valve body 1 is divided into two parts, front and rear, by the valve ball 21. Among them, the front half part is in the water inlet state and communicates with the hollow cavity 11 through the water inlet 12, and the rear half part is in the water outlet state and communicates with the valve core assembly 2 through the water outlet 13; in order to meet the production requirements, the openings on the front and rear sides can also be used simultaneously. Only need to add two original V-shaped flow channels 211 on the ball valve, and control different V-shaped flow channels 211 to communicate with different flow channels according to the rotation direction, so as to increase the steam trap efficiency.

[0042] In this embodiment, sealing valve seats 24 are provided at the abutting positions of the valve ball 21 with the stopper 22 and the plug 23 respectively. The sealing valve seats 24 are made of modified reinforced PTFE material; and a spacer 25 is provided between the plug 23 and the valve body 1 and the stopper 22.

[0043] Specifically, when installing the valve ball 21, the valve ball 21 can be loaded from the second flow channel 231, and the sealing valve seat 24 is pressed tightly on the valve ball 21 by the plug 23 to form a sealing structure. At the same time, since the sealing valve seat 24 is made of modified reinforced PTFE material, the high-temperature resistance of the steam trap is improved, and it can work in an environment below 200°C. In order to further improve the sealing performance of the steam trap, when the plug 23 is tightened, a seal is formed by providing a spacer 25 between the plug 23 and the valve body 1, and seals are formed by gaskets between the front and rear gland covers; and the spacer 25 and the gaskets are also made of modified reinforced PTFE material, which not only improves the heat resistance of the steam trap, but also improves its sealing effect.

[0044] In this embodiment, as Figure 6 shown, the steam trap module 4 is one of a thermodynamic steam trap module, an installed bellows steam trap module, a bimetallic steam trap module or a Venturi steam trap module 4.

[0045] Specifically, compared with the way of adding multiple bypass pipelines and stop valves to the steam trap in the prior art, the steam trap of the present utility model can select different hydrophobic modules 4 according to actual production requirements. For example, if a thermodynamic steam trap module is installed on the first flow channel 221, a thermodynamic steam trap with bypass and cut-off is formed; by reversing the flow channel direction, a bellows steam trap module or a bimetallic steam trap module can be installed on the second flow channel 231. At this time, the first flow channel 221 can be used as a bypass to form a bellows steam trap module or a bimetallic steam trap with bypass and cut-off. Different Venturi hydrophobic modules 4 can also be installed on both the first flow channel 221 and the second flow channel 231, and different Venturi hydrophobic modules 4 can be switched according to the production process for hydrophobicity, thereby improving the energy-saving rate and realizing the function of multiple uses of one valve.

[0046] In this embodiment, as Figure 2 shown, the operation component 3 includes a valve stem 31, a connecting plate 32 and an actuator 33; the lower part of the valve stem 31 is connected to the valve ball 21, a valve stem 31 sealing component is connected between the middle part of the valve stem 31 and the valve body 1, and the upper part of the valve stem 31 is drivingly connected to the actuator 33; driven by the actuator 33, the valve stem 31 drives the valve ball 21 to rotate to open or close the steam trap; the connecting plate 32 is a C-shaped structure composed of multiple plate bodies spliced together, and one end of the connecting plate 32 is fixed to the valve body 1 by a round nut.

[0047] Specifically, when the position of the valve ball 21 changes, it is driven by the actuator 33. Among them, the actuator 33 can be one of a manual handwheel, an electric actuator or a pneumatic actuator. Different actuators 33 can be selected according to production requirements. Among them, the manual handwheel is manually rotated and controlled. By rotating the handwheel, the valve stem 31 is driven to rotate, so that the valve ball 21 connected to the valve stem 31 through the groove 212 rotates together, thereby changing the position of the V-shaped flow channel 211 on the valve ball 21 to control the opening and closing of the steam trap; while the electric actuator or the pneumatic actuator is used to automatically open and close the steam trap; the advantage of automatically opening and closing the steam trap is that it can automatically control the opening degree of the steam trap by detecting the temperature of the condensate water behind the valve, so as to realize automatic hydrophobicity; in the actual production process, different actuator controllers are generally selected according to the flow coefficient of the steam trap. Generally, a manual handwheel is used for hydrophobicity at low flow rates, and an electric / pneumatic control is used to hydrophobicize the opening degree of the steam trap at high flow rates, which can not only avoid steam leakage but also meet the production needs.

[0048] In this embodiment, the valve stem 31 sealing assembly includes a sealing valve cover 51, a spring compensator 52, and a sealing ring 53; the sealing valve cover 51 is threadedly connected to the valve body 1; the spring compensator 52 is disposed between the sealing valve cover 51 and the valve body 1, and the spring compensator 52 is sleeved on the outer side surface of the valve stem 31; the sealing ring 53 is disposed at the connection between the valve stem 31 and the valve body 1.

[0049] Specifically, the sealing valve cover 51 can seal the gap between the valve body 1 and the valve stem 31, and cooperate with the sealing ring 53 to further seal the sealing valve cover 51, thereby avoiding steam leakage when the steam trap is opened; at the same time, a spring compensator 52 is provided to compensate for the change in tension in the valve stem 31. Since the steam trap acts in high-temperature steam, the valve stem 31 will be affected by temperature. After the length of the valve stem 31 changes (caused by temperature), try to keep the tension in the contact suspension and the position of the contact line basically constant; when the temperature changes, the valve stem 31 expands or contracts due to temperature influence. Under the action of the spring compensator 52, the valve stem 31 moves along the line direction to automatically adjust the tension of the valve stem 31 and thereby keep the sag of the valve stem 31 compliant with the regulations; the specific working process is that the spring compensator 52 internally contains a spring with a certain initial compression force and a fixed rope wound around the valve stem 31. When the fixed rope elongates, the spring is released and the valve stem 31 retracts the fixed rope; when the fixed rope contracts, the spring is compressed and the valve stem 31 extends, so that the tension of the fixed rope is maintained within a certain range, thereby improving the sealing effect and the transmission effect of the valve stem 31.

[0050] The working principle of the present utility model:

[0051] Install the steam trap of the present utility model in the production equipment, connect the water inlet 12 to the steam or heat interface of the production equipment, and connect the water outlet 13 to the condensate discharge interface; when introducing steam or heat, open the steam trap, and use the operating component 3 to adjust the position of the valve ball 21 in the valve body 1 so that the V-shaped flow channel 211 on the valve ball 21 is connected to the first flow channel 221, and the second flow channel 231 is in a closed state. At this time, the fluid flows along the water inlet 12 through the valve ball 21 into the first flow channel 221 at the rear, and flows out from the water outlet 13 after passing through the hydrophobic module 4 to maintain a normal hydrophobic state; when performing a bypass operation, change the position of the valve ball 21 in the valve body 1 through the operating component 3 so that the V-shaped flow channel 211 on the valve ball 21 is connected to the second flow channel 231, and the first flow channel 221 is in a closed state. At this time, the fluid flows along the water inlet 12 through the valve ball 21 into the second flow channel 231 at the rear, and flows out from the water outlet 13 after passing through the hydrophobic module 4 (equivalent to opening the bypass); when closing the steam trap, use the operating component 3 again to change the position of the valve ball 21 in the valve body 1 so that the V-shaped flow channel 211 on the valve ball 21 is not connected to the first flow channel 221 and the second flow channel 231. At this time, the fluid cannot flow out through the valve body 1; thus, realizing a quick adjustment of the state of the steam trap; and different hydrophobic modules 4 can be installed in the flow channel according to different production conditions, so that different hydrophobic states can be switched, and the hydrophobic effect can be better improved; in addition, the present utility model not only reduces the volume of the steam trap group, but also reduces the installation cost and the heat preservation cost; makes the maintenance of the steam trap simple and convenient, and the maintenance cost is low.

[0052] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are represented by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A steam trap with a bypass, comprising a valve body, a spool assembly disposed within the valve body, and an operating assembly for controlling the opening and closing of the spool assembly, characterized in that, The valve core assembly includes a valve ball, a stopper and a screw plug. The valve ball is provided with a V-shaped flow channel, and the valve ball is movably connected between the screw plug and the stopper; one end of the stopper is fixed to the inner wall of the valve body, and the other end is connected to the screw plug, and a first flow channel is provided at the center of the stopper; a second flow channel is provided on the screw plug, the second flow channel and the first flow channel are located on the same axis, and at least one hydrophobic module is provided in the second flow channel and the first flow channel; the first flow channel and the second flow channel are connected to each other at the right side of the valve ball; by rotating the position of the valve ball, switching to different flow channels and hydrophobic states: When the valve ball rotates to the V-shaped flow channel connected to the first flow channel, the second flow channel is in a closed state, and the fluid flows from the water inlet through the valve ball to the rear first flow channel, and flows out from the water outlet after passing through the hydrophobic module, achieving the hydrophobic function; When the valve ball rotates to the V-shaped flow channel and is connected to the second flow channel, the first flow channel is in a closed state, and the fluid flows from the water inlet through the valve ball to the second flow channel, and flows out from the water outlet after passing through the hydrophobic module, achieving a bypass function; When the valve body is closed, the V-shaped flow channel is not connected with the first flow channel and the second flow channel, and the fluid flowing in from the water inlet is blocked in the V-shaped flow channel of the valve ball, thereby achieving a cut-off function.

2. The trap with bypass according to claim 1, characterized in that, A hollow cavity is provided in the valve body, and a plurality of openings connected to the hollow cavity are provided around the valve body, wherein the openings on the left and right sides of the valve body are configured as a water inlet and a water outlet, and the openings on the front and rear sides are connected to valve covers, and a sealing gasket is provided between the valve cover and the valve body.

3. The steam trap with a bypass according to claim 1, characterized in that, A groove is formed at one end of the valve ball, and the operating assembly is rotatably connected to the valve ball through the groove.

4. The trap with bypass according to claim 1, wherein, Sealing valve seats are arranged at the abutting positions of the valve ball, the stopper and the screw plug respectively.

5. The steam trap with a bypass according to claim 1, characterized in that, A cushion block is arranged between the screw plug, the valve body and the stopper.

6. The trap with bypass according to claim 1, characterized in that, The trap module is one of a thermodynamic trap module, a membrane box trap module, a bimetal trap module or a Venturi trap module.

7. The trap with bypass according to claim 1, characterized in that, The operating assembly includes a valve stem, a connecting plate and an actuator; the lower portion of the valve stem is connected to the valve ball, a valve stem sealing assembly is connected between the middle portion of the valve stem and the valve body, and the upper portion of the valve stem is transmission-connected to the actuator; under the drive of the actuator, the valve stem drives the valve ball to rotate to open or close the steam trap.

8. The steam trap with bypass according to claim 7, characterized in that, The valve stem sealing assembly includes a sealing valve cover, a spring compensator and a sealing ring; the sealing valve cover is connected to the valve body through threads; the spring compensator is arranged between the sealing valve cover and the valve body, and the spring compensator is sleeved on the outer side of the valve stem; the sealing ring is sleeved at the connection between the valve stem and the valve body.

9. The trap with bypass according to claim 7, characterized in that, The connecting plate is a U-shaped structure composed of a plurality of plates spliced together, and one end of the connecting plate is fixed to the valve body through a round nut.

10. The steam trap with a bypass according to claim 7, characterized in that, The execution driver adopts one of a manual hand wheel, an electric actuator or a pneumatic actuator.

Images