A bypass float steam trap

Abstract

This utility model provides a bypass float steam trap, belonging to the field of valve technology. It solves the technical problems of existing float steam traps, such as their complex structure. This bypass float steam trap includes a valve body and a valve core. The valve body contains a float that can open or close the valve core. The valve body has a flow-through component that can move relative to the valve body, approaching or moving away from the float. When the flow-through component moves away from the float, the float is in a free state; when the flow-through component moves closer to the float, it pushes the float, which is currently in the closed position, away from that position. This utility model has the advantages of simpler structure and lower cost.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a bypass float drain valve. Background Technology

[0002] Float steam traps are installed at the end of the piping in steam heating systems to separate steam and water. In actual use, steam lock can occur when gas enters the valve body and piping. When the float is in the closed valve core position, the gas blocks the piping, preventing condensate from entering the valve body. The main solution to steam lock is to vent the gas from the piping connected to the steam trap. Currently, two methods are generally used: one is to connect a bypass pipe in parallel. When steam lock occurs, the bypass pipe is opened to vent the gas. However, setting up a bypass pipe increases the footprint and structural complexity, leading to higher costs. The other method is to install an vent valve on the valve body. Vent valves can be automatic or manual. Automatic vent valves use temperature-sensitive materials for venting, which are expensive and prone to damage. Manual vent valves require manual opening, posing a risk of contact with high-temperature steam, making them more dangerous. Existing structures for solving steam lock problems all achieve this by creating a separate channel for gas venting. Utility Model Content

[0003] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bypass float steam trap. The technical problem solved by this invention is to allow gas to be discharged from the valve core during steam lock by changing the position of the float.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] A bypass float trap includes a valve body and a valve core. The valve body is provided with a float that can open or close the valve core. The valve body is characterized by having a draining component that can move relative to the valve body to approach or move away from the float. When the draining component moves away from the float, the float is in a free state. When the draining component approaches the float, it can push the float, which is located in the closed valve core position, away from that position.

[0006] When a float-closed valve core causes airlock, the float can be pushed away from the closed valve core position by moving the draining device, thereby opening the valve core and venting the gas. This allows condensate to enter the drain valve and be discharged, eliminating the need for additional bypass pipes or vent valves for venting. This simplifies the overall pipe structure, reduces costs, and makes the airlock solution more efficient and safer.

[0007] In the aforementioned bypass float steam trap, the unblocking component is a push rod. A connecting seat is fixed to the lower side of the valve body, and the push rod passes through the connecting seat. The inner end of the push rod extends into the valve body and faces the float. The push rod can move axially relative to the connecting seat, and the push rod is sealed to the connecting seat. The valve core is opened by the push rod extending into the valve body to push the float away from the closed valve core position. During normal use of the float steam trap, the push rod retracts outward to avoid interfering with the float, allowing the float to be in a free state.

[0008] In the aforementioned bypass float steam trap, the push rod has a threaded section, and the threaded section of the push rod is threadedly connected to the connecting seat. By rotating the push rod, axial movement and extension of the push rod relative to the connecting seat can be achieved, allowing the push rod to move towards the float and push the float away from the position of the closed valve core.

[0009] In the aforementioned bypass float steam trap, a sealing sleeve and a sealing ring are fitted on the outside of the threaded section of the push rod. The sealing sleeve is fitted onto the push rod, and its outer circumferential surface is tapered with the sleeve facing the threaded section. The sealing ring is fitted onto the outer circumferential surface of the sealing sleeve and makes sealing contact with the connecting seat. As the push rod moves into the valve body, the sealing sleeve moves inward. At this time, the sealing ring is compressed under the action of the sealing sleeve, improving the sealing performance between it and the connecting seat. The sealing sleeve is also subjected to the pressure of the sealing ring, which further improves the sealing performance between the sealing sleeve and the push rod. This structure can withstand the rapid entry of cooling water into the valve body after the valve core is opened, as well as the sealing performance of high-temperature steam, preventing water and air leakage.

[0010] In the aforementioned bypass float steam trap, a sealing retaining ring is fitted onto the front end of the sealing sleeve on the push rod, and the front side of the sealing ring abuts against the sealing retaining ring. The sealing retaining ring ensures that the sealing ring is always fitted onto the outer circumferential surface of the sealing sleeve.

[0011] In the aforementioned bypass float drain valve, a rotating handle is fixed to the outer end of the push rod. The rotating handle facilitates the rotation of the push rod.

[0012] In another scenario, in the aforementioned bypass float trap, the middle section of the push rod is a plug-in section. A sealing ring is provided between the plug-in section and the connecting seat. Both ends of the connecting seat are provided with retaining edges, and the plug-in section can move back and forth between the two retaining edges. The push rod achieves axial movement relative to the connecting seat by pushing and pulling. When pushed inward, the push rod moves towards the float and pushes the float away from the position of the closed valve core. When pulled outward, the float is in a free state and can be located in the position of the closed valve core.

[0013] In the aforementioned bypass float drain valve, an elastic gasket is fixed to the inner end of the push rod. The elastic gasket contacts the float to prevent scratching the float.

[0014] In the aforementioned bypass float trap, the push rod faces the lower part of the float. The push rod provides an upward thrust to the float, making it easier for the float to disengage from the valve core.

[0015] In the aforementioned bypass float steam trap, the connecting seat is threadedly sealed to the valve body. The connecting seat can be removed, and the hole on the valve body can be used as a drain port after removal.

[0016] Compared with existing technologies, this bypass float trap has the advantages of solving the steam lock problem, having a simpler overall installation structure, reducing the installation of bypass valves and bypass pipelines, and lowering the overall cost. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of this bypass float drain valve.

[0018] Figure 2 This is a top view schematic diagram of the bypass float drain valve.

[0019] Figure 3 It is along Figure 2 A schematic diagram of the cross-sectional structure of AA.

[0020] Figure 4 It is the valve core closing edge Figure 2 Schematic diagram of the cross-sectional structure of BB.

[0021] Figure 5 yes Figure 4 A magnified structural diagram of part A in the middle.

[0022] Figure 6 It is when the push rod pushes away from the float along Figure 2 Schematic diagram of the cross-sectional structure of BB.

[0023] In the diagram, 1 is the valve body; 11 is the inlet; 12 is the outlet; 13 is the valve cavity; 14 is the valve core; 15 is the float; 2 is the push rod; 2a is the threaded section; 21 is the connecting seat; 22 is the elastic gasket; 23 is the rotating handle; 3 is the sealing ring; 31 is the sealing sleeve; and 32 is the sealing retaining ring. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] Example 1

[0026] like Figures 1 to 6As shown, the bypass float steam trap includes a valve body 1 and a valve core 14. The valve body 1 is provided with an inlet 11 and an outlet 12. The valve core 14 is located between the valve cavity 13 and the outlet 12. The float 15 is located in the valve cavity 13. When the float 15 blocks the inner port of the valve core 14, the valve core 14 is closed. When the float 15 disengages from the inner port of the valve core 14, the valve core 14 is opened.

[0027] The valve body 1 is equipped with a unclogger, which can move relative to the valve body 1 to approach or move away from the float 15. When the unclogger moves away from the float 15, the float 15 is in a free state. When the unclogger approaches the float 15, it can push the float 15, which is located at the closed valve core 14, away from that position. Specifically, in this embodiment, the unclogger is a push rod 2. The lower side of the valve body 1 has a hemispherical bottom. When the float 15 closes the valve core 14, the lower ball of the float 15 is located in the bottom. A connecting seat 21 is fixed to the bottom of the valve body 1. The connecting seat 21 is threadedly sealed to the valve body 1. The push rod 2 passes through the connecting seat 21. An elastic gasket 22 is fixed to the inner end of the push rod 2. The inner end of the push rod 2 extends into the valve body 1 and faces the lower ball of the float 15. A rotating handle 23 is fixed to the outer end of the push rod 2. The push rod 2 has a threaded section 2a, which is threadedly connected to the connecting seat 21. A sealing sleeve 31 and a sealing ring 3 are fitted on the outside of the threaded section 2a on the push rod 2. The sealing sleeve 31 is fitted on the push rod 2, and the outer circumferential surface of the sealing sleeve 31 is conical and faces the threaded section 2a. The sealing ring 3 is located between the sealing sleeve 31 and the connecting seat 21. A sealing retaining ring 32 is also fitted on the front end of the sealing sleeve 31 on the push rod 2, and the front side of the sealing ring 3 abuts against the sealing retaining ring 32.

[0028] In normal operation, the push rod 2 is in the retracted position, and the float 15 is free within the valve body 1, allowing it to freely open or close the valve core 14. When airlock occurs in the float valve, rotating the handle 23 extends the push rod 2 into the valve body 1. The elastic washer 22 of the push rod 2 pushes the float 15 away from the position where the valve core 14 is closed. Figure 3 The float ball 15 is located at the position of the closed valve core 14. Figure 6 The push rod 2 lifts the float 15, at which point the float 15 leaves the position of the closed valve core 14, the valve core 14 is opened, and the gas in the valve body 1 and the pipeline will be discharged through the valve core 14, allowing condensate to enter the float steam trap. Due to the large impact force of the condensate entering the steam trap, it will simultaneously carry the gas in the valve body 1 out of the valve body 1. After the condensate and gas are discharged, steam enters the valve body 1. Then, operate the rotating handle 23 to retract the push rod 2, and the float 15 returns to the free state, completing the release of the steam lock state.

[0029] During operation, the gas, condensate and steam in the valve body 1 are discharged through the water pipe and will not enter the operating space, which is safe and reliable; the position of the float 15 is adjusted by the push rod 2, which is simple, reliable and easy to operate.

[0030] Example 2

[0031] This embodiment is basically the same as the first embodiment in terms of structure and principle, except that:

[0032] The middle section of the push rod is the insertion / removal section. A sealing ring is provided between the insertion / removal section and the connecting seat. Both ends of the connecting seat are equipped with retaining edges, allowing the insertion / removal section to move back and forth between the two retaining edges. The push rod achieves axial movement relative to the connecting seat through a push-pull mechanism. When pushed inward, the push rod moves towards the float and pushes the float away from the position of the closed valve core. When pulled outward, the float is in a free state and can be positioned in the position of the closed valve core.

[0033] Example 3

[0034] This embodiment is basically the same as the first embodiment in terms of structure and principle, except that:

[0035] The unblocking component is a block. A slide rail is located on the lower inner wall of the valve body, with one end close to the valve core and the other end away. The unblock is slidably connected to the slide rail. When the unblock is at one end of the slide rail, the float cannot close the valve core; when the unblock is at the other end, the float can close the valve core. The unblock is magnetic, and a magnet is located on the outer wall of the valve body. The position of the unblock is controlled by the magnet. Moving the magnet causes the unblock to move along the slide rail. Under normal use, the magnet adheres to the valve body, keeping the unblock at the end of the slide rail away from the valve core. When airlock occurs, a section of the magnet moves the unblock to one end of the slide rail, pushing the float away from the closed valve core position, thus opening the valve core.

[0036] Example 4

[0037] This embodiment is basically the same as the first embodiment in terms of structure and principle, except that:

[0038] The unblocking component is a rotating rod. A rotating shaft is rotatably connected to the side wall of the valve body. The rotating rod is fixed to the inner end of the rotating shaft and is perpendicular to the rotating shaft. A top-opening sleeve is fixed to the end of the rotating rod. A support platform is provided at the bottom of the valve body. When the float closes the valve core, it is located on the support platform. The support platform makes a gap between the lower hemisphere of the float and the inner wall of the valve body. When the rotating rod is vertically downward, the top-opening sleeve is located in the gap. When the rotating rod is rotated upward, the top-opening sleeve can contact the float and push the float away from the position of closing the valve core.

[0039] The outer end of the shaft is connected to a handle. The shaft and the valve body are sealed together. Normally, the rod is in a natural vertical downward position, and the float can be in the closed valve core position. When air lock occurs, the shaft is rotated. When the rod is rotated upward, the opening sleeve will contact the float and push the float away from the closed valve core position.

[0040] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A bypass float trap, comprising a valve body (1) and a valve core (14), wherein the valve body (1) is provided with a float (15) capable of opening or closing the valve core (14), characterized in that, The valve body (1) is provided with a draining component. The draining component can move relative to the valve body (1) closer to or away from the float (15). When the draining component moves away from the float (15), the float (15) is in a free state. When the draining component moves closer to the float (15), the draining component can push the float (15) located at the closed valve core (14) away from that position. The draining component is a push rod (2). A connecting seat (21) is fixed on the lower side of the valve body (1). The push rod (2) passes through the connecting seat (21). The inner end of the push rod (2) extends into the valve body (1) and faces the float (15). The push rod (2) can move axially relative to the connecting seat (21). The push rod (2) is sealed to the connecting seat (21).

2. The bypass float drain valve according to claim 1, characterized in that, The middle section of the push rod (2) is provided with a threaded section (2a), and the threaded section (2a) of the push rod (2) and the connecting seat (21) are threadedly connected.

3. The bypass float drain valve according to claim 2, characterized in that, The top rod (2) is fitted with a sealing sleeve (31) and a sealing ring (3) on the outside of the threaded section (2a). The sealing sleeve (31) is fitted on the top rod (2). The outer circumferential surface of the sealing sleeve (31) is conical and the sealing sleeve (31) faces the threaded section (2a). The sealing ring (3) is fitted on the outer circumferential surface of the sealing sleeve (31) and makes a sealing contact with the connecting seat (21).

4. The bypass float drain valve according to claim 3, characterized in that, A sealing ring (32) is also fitted on the front end of the sealing sleeve (31) on the top rod (2), and the front side of the sealing ring (3) abuts against the sealing ring (32).

5. The bypass float drain valve according to claim 2, characterized in that, The outer end of the top rod (2) is fixed with a rotating handle (23).

6. The bypass float trap according to claim 1, characterized in that, The middle section of the top rod (2) is the insertion and removal section. A sealing ring (3) is provided between the insertion and removal section and the connecting seat (21). Both ends of the connecting seat (21) are provided with retaining edges. The insertion and removal section can move back and forth between the two retaining edges.

7. The bypass float trap according to any one of claims 1 to 6, characterized in that, An elastic washer (22) is fixed to the inner end of the top rod (2).

8. The bypass float trap according to any one of claims 1 to 6, characterized in that, The top rod (2) is directed toward the lower ball of the float (15).

9. The bypass float trap according to any one of claims 1 to 6, characterized in that, The connecting seat (21) is threadedly sealed to the valve body (1).

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