By-pass lever drain valve

Abstract

The utility model provides a bypass formula lever trap belongs to valve technical field. It has solved existing bypass formula lever trap to remove steam lock structure complex etc. technical problem. This bypass formula lever trap includes valve body, floating element and lever, the valve body is installed with the valve core that communicates valve cavity and outlet channel, the lever is hinged in the valve body, the lever is connected with floating element, the lever is fixed with the valve plug that can seal valve core inner end, the valve body is firmly connected with the connecting seat, the connecting seat is equipped with the jackscrew, the jackscrew can move along the axial direction relative to the connecting seat, the inner end of jackscrew is aligned with valve core, when the jackscrew moves inwards, the inner end of jackscrew can pass through valve core and push the valve plug away from the position of sealing valve core inner end. The utility model has the advantages of can remove steam lock, simple structure, safe operation and no risk.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology and relates to a steam trap, particularly a bypass lever steam trap. Background Technology

[0002] Steam traps are installed at the end of the piping in a steam heating system to separate steam and water. Lever steam traps include inverted bucket type steam traps and lever float type steam traps. The floating element of the inverted bucket type steam trap is an inverted bucket, while the floating element of the lever float type steam trap is a float. The lever of the lever steam trap opens or closes the valve core by adjusting its position relative to the floating element.

[0003] In practical use, lever steam traps can become blocked by gas in the valve body and piping, preventing condensate from entering the valve body. In this situation, the floating element is in a low position, and the lever is in a position that seals the valve core. Gas cannot escape, and condensate cannot enter, causing the floating element to remain stationary, resulting in steam lock in the steam trap. The main solution to steam lock is to release 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 release 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 air vent valve on the valve body. Air vent valves can be automatic or manual. Automatic air vent valves use temperature-sensitive materials for venting, which is costly and prone to damage. Manual air vent valves require manual opening, posing a risk of contact with high-temperature steam, making them highly dangerous. Furthermore, all air vent valves release gas into the work area, adding to the danger. Existing structures that solve the steam lock problem all achieve this by creating a separate channel for gas release. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a bypass lever steam trap. The technical problem solved by this invention is that the valve core can be opened to release air when the lever steam trap is locked.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A bypass lever steam trap includes a valve body, a floating element, and a lever. A valve core communicating with a valve cavity and a water outlet is installed in the valve body. The lever is hinged in the valve body and connected to the floating element. A valve plug that can seal the inner end of the valve core is fixed on the lever. The valve body is characterized by having a connecting seat fixedly connected to it, and a push rod passing through the connecting seat. The push rod can move axially relative to the connecting seat. The inner end of the push rod is aligned with the valve core. When the push rod moves inward, the inner end of the push rod can pass through the valve core and push the valve plug away from the position where it seals the inner end of the valve core.

[0007] When air lock occurs, the push rod is moved inward, and the inner section of the push rod passes through the valve core, pushing the valve plug open from the sealed inner end of the valve core. The valve core is opened, and the gas in the valve cavity will enter the water outlet channel through the valve core and be discharged. After the condensate enters the valve cavity, the push rod is retracted outward. At this time, the position of the floating part is determined according to the water level of the condensate in the valve cavity, and the valve plug of the lever is determined according to the water level of the condensate, so as to realize the normal operation of the lever steam trap.

[0008] In the aforementioned bypass lever steam trap, the section of the push rod that extends into the valve core is the inner section, and the diameter of the inner section of the push rod is smaller than the diameter of the inner hole of the valve core. When the inner section of the push rod passes through the valve core, there is a gap between it and the valve core, allowing gas and water to be discharged into the outlet channel through the gap.

[0009] In the aforementioned bypass lever steam trap, the middle section of the push rod has a threaded section, which is threadedly connected to the connecting seat. By rotating the push rod, axial movement of the push rod relative to the connecting seat can be achieved, allowing the inner end of the push rod to pass through the valve core and push the valve plug open from the position of the sealed inner end of the valve core.

[0010] In the aforementioned bypass lever 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 with the push rod, and the sealing ring moves relative to the side with the larger diameter of the sealing sleeve. 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.

[0011] In the aforementioned bypass lever 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.

[0012] In the aforementioned bypass lever steam trap, a rotating handle is fixed to the outer end of the push rod. The rotating handle allows for easy rotation of the push rod.

[0013] In the aforementioned bypass lever steam 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 inner end of the push rod can pass through the valve core and push the valve plug out of the sealed valve core. When pulled outward, the push rod exits the valve core. The position of the valve plug is determined by the lever driven by the floating component. The sealing ring ensures a seal between the plug-in section and the connecting seat, and the retaining edges limit the displacement of the push rod during pushing and pulling.

[0014] Compared with existing technologies, this bypass lever steam trap can release the steam lock of the lever steam trap without the need for additional pipelines. It has a simple structure, and the gas in the valve chamber is directly discharged through the water outlet channel without affecting the working space. It is safe and risk-free to operate. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the bypass lever steam trap.

[0016] Figure 2 This is a cross-sectional structural diagram of the bypass lever steam trap when it is airlocked.

[0017] Figure 3 This is a cross-sectional structural diagram of the bypass lever steam trap when the top rod is released from the steam lock.

[0018] Figure 4 yes Figure 3 Enlarged view of part A in the middle.

[0019] Figure 5 This is a cross-sectional structural diagram of the bypass lever steam trap in Embodiment 3.

[0020] In the diagram, 1. Valve body; 11. Valve cavity; 12. Water outlet channel; 13. Valve core; 14. Lever; 15. Valve plug; 16. Inverted bucket; 2. Connecting seat; 3. Push rod; 31. Threaded section; 32. Inner section; 33. Rotating handle; 4. Sealing sleeve; 41. Sealing ring; 42. Sealing retaining ring; 5. Float ball. Detailed Implementation

[0021] 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.

[0022] Example 1

[0023] like Figures 1 to 3As shown, the bypass lever steam trap includes a valve body 1, a floating element, and a lever 14. A valve core 13 is installed inside the valve body 1, which connects the valve chamber 11 and the water outlet channel 12. The lever 14 is connected to the floating element, and a valve plug 15 that can seal the inner end of the valve core 13 is fixed on the lever 14. In this embodiment, the floating element is an inverted bucket 16. One end of the lever 14 is hinged inside the valve body 1, and the other end of the lever 14 is connected to the inverted bucket 16. When the steam in the inverted bucket 16 increases, the inverted bucket 16 floats upward, and the lever 14 moves upward, causing the valve plug 15 to seal the inner end of the valve core 13, preventing steam from being discharged from the water outlet channel 12. When the steam decreases, the inverted bucket 16 sinks, and the lever 14 moves downward, causing the valve plug 15 to open the inner end of the valve core 13.

[0024] A connecting seat 2 is fixedly connected to the upper end of the valve body 1. The connecting seat 2 is sealed to the valve body 1. A push rod 3 is passed through the connecting seat 2. In this embodiment, the middle section of the push rod 3 is provided with a threaded section 31. The threaded section 31 of the push rod 3 is threadedly connected to the connecting seat 2. A rotating handle 33 is fixed to the outer end of the push rod 3. By rotating the push rod 3, the push rod 3 can move axially relative to the connecting seat 2. The inner end of the push rod 3 is aligned with the valve core 13. The section of the push rod 3 that extends into the valve core 13 is the inner section 32. The diameter of the inner section 32 of the push rod 3 is smaller than the diameter of the inner hole of the valve core 13. When the push rod 3 moves inward, the inner end of the push rod 3 can pass through the valve core 13 and push the valve plug 15 out from the position of sealing the inner end of the valve core 13. In this embodiment, the inner section 32 of the push rod 3 is always inserted into the valve core 13. Water and gas can be discharged into the water outlet channel 12 through the gap. This setting can reduce the stroke of the axial movement of the push rod 3, so that the valve plug 15 can be opened when the push rod 3 moves inward, reducing the number of rotations and making the operation more convenient.

[0025] like Figure 4 As shown, a sealing sleeve 4 and a sealing ring 41 are fitted on the outside of the threaded section 31 of the push rod 3. The sealing sleeve 4 is fitted onto the push rod 3, and its outer circumferential surface is tapered, with the sealing sleeve 4 facing the threaded section 31. The sealing ring 41 is fitted onto the outer circumferential surface of the sealing sleeve 4 and makes sealing contact with the connecting seat 2. A sealing retaining ring 42 is also fitted on the front end of the sealing sleeve 4 on the push rod 3, and the front side of the sealing ring 41 abuts against the sealing retaining ring 42. The sealing connection between the push rod 3 and the connecting seat 2 is achieved through the cooperation of the sealing sleeve 4, the sealing ring 41, and the sealing retaining ring 42.

[0026] When steam lock occurs in the steam trap of lever 14, rotating handle 33 rotates the push rod 3, which moves inward. The inner section 32 of the push rod 3 passes through the valve core 13, and the inner end of the push rod 3 pushes the valve plug 15 out of the sealed position of the inner end of the valve core 13. The gas in the valve chamber 11 will be discharged into the water outlet channel 12 through the gap between the inner section 32 of the push rod 3 and the valve core 13, thereby releasing the steam lock of the steam trap of lever 14. After completion, rotating handle 33 in reverse will cause the push rod 3 to retract outward. At this time, the position of lever 14 is determined by the inverted bucket 16, realizing the normal operation of the steam trap of lever 14.

[0027] Example 2

[0028] This embodiment is basically the same as Embodiment 1 in structure and principle, except that: the middle section of the push rod is the insertion / extraction section, a sealing ring is provided between the insertion / extraction section and the connecting seat, and both ends of the connecting seat are provided with retaining edges, allowing the insertion / extraction section to 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 inner end of the push rod can pass through the valve core and push the valve plug out from the position of the sealed inner end of the valve core. When pulled outward, the push rod exits the valve core. The position of the valve plug is determined by the lever driven by the floating component. The sealing ring ensures a seal between the insertion / extraction section and the connecting seat, and the retaining edges limit the displacement of the push rod during pushing and pulling.

[0029] Example 3

[0030] This embodiment is basically the same as the first embodiment in terms of structure and principle, except that:

[0031] like Figure 5 As shown, in this embodiment, the floating component is a float 5, and the lever 14 is hinged inside the valve body 1. One end of the lever 14 is connected to the float 5, and the valve plug 15 is fixed to the other end of the lever 14. When the steam in the valve body 1 increases, the float 5 moves downward, and the other end of the lever 14 moves upward, causing the valve plug 15 to seal the inner end of the valve core 13, preventing steam from being discharged from the water outlet channel 12. When the cooling water increases, the float 5 floats upward, and the other end of the lever 14 moves downward, causing the valve plug 15 to open the inner end of the valve core 13. A connecting seat 2 is fixed to the upper end of the valve body 1, and the connecting seat 2 is sealed to the valve body 1. A push rod 3 passes through the connecting seat 2, and a rotating handle 33 is fixed to the outer end of the push rod 3. By rotating the push rod 3, the push rod 3 can move axially relative to the connecting seat 2, and the inner end of the push rod 3 is aligned with the valve core 13.

[0032] 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 lever steam trap, comprising a valve body (1), a floating element, and a lever (14), wherein a valve core (13) communicating with a valve cavity (11) and a water outlet channel (12) is installed inside the valve body (1), the lever (14) is hinged inside the valve body (1), the lever (14) is connected to the floating element, and a valve plug (15) capable of sealing the inner end of the valve core (13) is fixed on the lever (14), characterized in that, A connecting seat (2) is fixedly connected to the valve body (1). A push rod (3) is passed through the connecting seat (2). The push rod (3) can move axially relative to the connecting seat (2). The inner end of the push rod (3) is aligned with the valve core (13). When the push rod (3) moves inward, the inner end of the push rod (3) can pass through the valve core (13) and push the valve plug (15) open from the position of the inner end of the sealing valve core (13).

2. The bypass lever steam trap according to claim 1, characterized in that, The section of the push rod (3) that extends into the valve core (13) is called the inner section (32), and the diameter of the inner section (32) of the push rod (3) is smaller than the diameter of the inner hole of the valve core (13).

3. The bypass lever steam trap according to claim 1 or 2, characterized in that, The middle section of the top rod (3) is provided with a threaded section (31), and the threaded section (31) of the top rod (3) is threadedly connected to the connecting seat (2).

4. The bypass lever steam trap according to claim 3, characterized in that, The top rod (3) is fitted with a sealing sleeve (4) and a sealing ring (41) on the outside of the threaded section (31). The sealing sleeve (4) is fitted on the top rod (3). The outer circumferential surface of the sealing sleeve (4) is conical and the sealing sleeve (4) faces the threaded section (31). The sealing ring (41) is fitted on the outer circumferential surface of the sealing sleeve (4) and makes a sealing contact with the connecting seat (2).

5. The bypass lever steam trap according to claim 4, characterized in that, A sealing ring (42) is also fitted on the top rod (3) at the front end of the sealing sleeve (4), and the front side of the sealing ring (41) abuts against the sealing ring (42).

6. The bypass lever steam trap according to claim 3, characterized in that, The outer end of the top rod (3) is fixed with a rotating handle (33).

7. The bypass lever steam trap according to claim 1 or 2, characterized in that, The middle section of the top rod (3) is the insertion and removal section. A sealing ring (41) is provided between the insertion and removal section and the connecting seat (2). Both ends of the connecting seat (2) are provided with retaining edges. The insertion and removal section can move back and forth between the two retaining edges.

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