A steam exhaust valve needle and a steam exhaust valve

Abstract

The application relates to a steam exhaust valve needle and a steam exhaust valve, wherein the steam exhaust valve needle is matched with a lever movable support, the needle rod is provided with two guiding matching grooves at the bottom, the lever movable support is clamped between the two guiding matching grooves, and the guiding matching grooves are provided with movable spaces for enabling the lever movable support to move up and down. The connection mode of the needle rod and the lever movable support is fundamentally changed, two independent guiding matching grooves are adopted to replace the traditional annular groove, the free rotation and shaking of the needle rod in the circumferential direction are greatly limited, the needle rod can only stably move up and down along the vertical direction under the driving of the floating ball, the floating supporting stroke of the floating ball is truly and effectively restored, and the action accuracy and reliability are improved.

Description

Technical Field

[0001] This application relates to the field of exhaust valve technology, and more specifically, to an exhaust valve pin and an exhaust valve. Background Technology

[0002] The vent valve is a valve used for automatic venting of steam in a heating system. In existing vent valves, the conventional structure includes a valve seat, a float, a pin, and a movable bracket. The movable bracket is installed between the pin and the float. After the heating water in the heating system enters the vent valve through the inlet at the bottom of the valve seat, the float rises under the action of buoyancy and drives the movable bracket and the pin to move upward. Finally, the pin closes the vent port at the top of the valve body, achieving the effect of automatic venting and sealing of the vent valve.

[0003] In existing conventional structures, in order to assemble and install the movable frame and the ejector pin, the ejector pin is generally provided with an annular groove. The movable frame is fitted into the annular groove with a clearance fit. During the float's upward movement, due to the large clearance between the movable frame and the ejector pin's annular groove, the ejector pin is prone to ineffective rotation in the circumferential direction, making it difficult to accurately reproduce the float's upward support stroke. Utility Model Content

[0004] The purpose of this application is to provide a vent valve pin and a vent valve that can enhance the stability and reliability of the pin movement, accurately reproduce the upward support stroke of the float, and ensure the effective and reliable vent sealing.

[0005] To achieve the above objectives, in a first aspect, this utility model provides a steam exhaust valve pin that is fitted with a lever movable bracket. The steam exhaust valve pin includes a pin rod, and the lever movable bracket includes a pair of spaced clamping links. The bottom of the pin rod is provided with two guide grooves that allow the clamping links to be fitted and moved. The movable lever support is clamped between the two guide grooves, and the guide grooves are provided with a movable space that allows the movable lever support to move up and down, so that the movable lever support can guide the ejector pin up and down under the upward support of the float.

[0006] In an optional embodiment, the guide groove includes a snap-fit ​​groove and a movable groove, with an arc-shaped groove surface at the top between the snap-fit ​​groove and the movable groove, and a downwardly inclined oblique groove surface at the bottom of the movable groove.

[0007] In an optional embodiment, the arc-shaped groove surface extends upwards and slopes from the mounting slot towards the movable slot.

[0008] In an optional embodiment, the top of the beveled groove surface is vertically opposite to the top of the arcuate groove surface.

[0009] In an optional embodiment, the guide grooves are symmetrically arranged on the left and right sides along the axial direction of the needle bar, and the arc-shaped groove surface and the oblique groove surface are mirror-symmetrical about the axis of the needle bar.

[0010] In an optional embodiment, the guide groove includes a vertical cross-section located on the needle bar, the vertical cross-section being disposed between the clamping slot and the movable slot, and the clamping connecting rod being in line-plane contact with the vertical cross-section.

[0011] Secondly, this utility model provides a steam exhaust valve, including a valve body, a valve cover, and a steam exhaust valve pin as described in any of the foregoing embodiments.

[0012] In an optional embodiment, the valve cover is provided with a vent port, the vent port is connected to a vent nozzle, the vent valve pin passes vertically through the vent port and is inserted into the vent nozzle, the vent nozzle is provided with a sealing gasket, the sealing gasket is provided with a vent hole, and the vent valve pin includes a pointed cone at the top that can lift and block the vent hole.

[0013] In an optional embodiment, a float ball is provided inside the valve body, and the top of the float ball is connected to the lever movable bracket; The lever-movable support is made of bent metal rods and includes a connecting rod in the middle. The top of the float is provided with a snap-fit ​​flap, and the connecting rod is snapped into the snap-fit ​​flap.

[0014] In an optional embodiment, the clamping connecting rod is disposed on both sides of the connecting rod and is clamped in the guide groove; The clamping connecting rod has outwardly bent connecting ends on both sides, and the inner side wall of the valve cover has mounting ears with through holes. The connecting ends are inserted and installed in the through holes.

[0015] The exhaust valve pin in this application, which is fitted with the lever movable bracket, has two independent guide grooves at the bottom of the pin bar, which allow the lever movable bracket to clamp the connecting rods separately and provide the necessary space for the lever movable bracket to move up and down.

[0016] It can fundamentally change the connection method between the ejector pin and the lever movable bracket. By using two independent guide grooves to replace the traditional annular groove, the free rotation and swaying of the ejector pin itself in the circumferential direction are greatly limited. This ensures that the ejector pin can only move stably up and down in the vertical direction under the drive of the float, which truly and effectively restores the upward support stroke of the float and improves the accuracy and reliability of the action.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of one side of the exhaust valve pin in this application; Figure 2 This is a schematic diagram of the structure of the other side of the exhaust valve pin in this application; Figure 3 This is a schematic diagram of the connection structure of the exhaust valve pin, lever movable bracket and float in this application; Figure 4 This is a schematic diagram of the external structure of the exhaust valve in this application; Figure 5 This is a schematic diagram showing the state of the exhaust valve in this application when a water float is floating inside the exhaust valve. Figure 6 This is a schematic diagram showing the state of the exhaust valve in this application when there is no water float sinking.

[0020] icon: 1-Ejector pin; 11-Needle shank; 12-Cone; 2-Guide groove; 21-Modifying groove; 22-Modible groove; 23-Arc-shaped groove surface; 24-Beveled groove surface; 25-Vertical cut surface; 3-Lever movable bracket; 31-Clamping connecting rod; 32-Connecting rod; 33-Connecting end; 4-Valve cover; 41-Exhaust nozzle; 42-Mounting lug; 43-Sealing gasket; 44-Exhaust port; 5-Float; 51-Card-mounted folding piece; 6-Water inlet. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] In the description of this application, it should be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "setup" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] See Figures 1-2 and combined Figures 3-4 ,as well as Figures 5-6 In this application, the exhaust valve pin 1 and the exhaust valve are improved by modifying the structure of the exhaust valve pin 1 and improving the engagement relationship between the lever movable bracket 3 and the pin 1, thereby enhancing the accuracy and reliability of the movement of the float 5 in transmitting the action of the pin 1.

[0025] The exhaust valve pin 1 in this utility model is used in the structure of the exhaust valve. Specifically, it cooperates with the lever movable bracket 3 and the float 5. The float 5 is set up in the valve cavity of the exhaust valve in a way that can be raised and lowered. When there is no water in the valve cavity, the float 5 sinks due to its own weight. When heating water enters from the bottom, the float 5 floats vertically upward under the action of buoyancy.

[0026] The top of the lever movable bracket 3 is hinged to the top of the valve body, and the bottom is connected to the top of the float 5. The paired clamping rods 31 of the lever movable bracket 3 are engaged in the clamping groove opened on the side wall of the ejector pin 1. The ejector pin 1 is located at the eccentric part of the float 5.

[0027] The lever-movable bracket 3, through its locking engagement with the mounting slot, allows the float 5 to sink under its own weight when there is no water in the valve cavity, thus driving the pin 1 to remain in a downward natural state, thereby opening the vent hole 44 and keeping the vent hole 44 in a state where steam can be vented; when heating water enters the valve body from the bottom inlet 6, the float 5 floats vertically upward under the action of buoyancy, and the lever-movable bracket 3 drives the pin 1 to rise, thereby venting steam during the rising process of the pin 1, and finally until the pin 1 blocks the vent hole in the vent nozzle 41 at the top of the vent valve, completing automatic venting and sealing.

[0028] In actual operation, the lever movable bracket 3 can use its top hinge point as the motion base point to drive the ejector pin 1 to move up and down during the up and down floating of the float 5, effectively exerting the lever movement effect. The existing clamping groove structure is basically in the form of annular groove. During the up and down movement of the ejector pin 1, there is an ineffective self-rotation action, and it is easy to jam, resulting in failure of motion transmission.

[0029] See Figure 1 In this utility model, the exhaust valve pin 1 is engaged with the lever movable bracket 3. The exhaust valve pin 1 includes a pin rod 11, and the lever movable bracket 3 includes a pair of spaced clamping connecting rods 31. The bottom of the pin rod 11 is provided with two guide grooves 2 for the clamping connecting rods 31 to be engaged and moved. The lever movable bracket 3 is clamped between the two guide fitting grooves 2. The guide fitting grooves 2 are provided with a movable space that allows the lever movable bracket 3 to move up and down, so that the lever movable bracket 3 can guide the ejector pin 1 up and down under the upward support of the float ball 5.

[0030] By setting two guide grooves 2 at the bottom of the needle bar 11 for clamping the connecting rod 31, the clamping method of the traditional annular groove and the lever movable bracket 3 is improved. The two guide grooves 2 can be used to clamp the connecting rod 31 in pairs at intervals, forming a space for vertical movement.

[0031] Two independent guide grooves 2 can limit the rotation of the ejector pin 1 in the circumferential direction, thereby ensuring that the ejector pin 1 can only move up and down stably in the vertical direction under the drive of the float ball 5, which improves the accuracy and reliability of the action, avoids the invalid stroke of the ejector pin 1 in the lifting process, and truly and effectively restores the upward support stroke of the float ball, making its lifting action under the drive of the float ball 5 more direct.

[0032] In one specific embodiment, from the perspective of the specific structure of the guide groove 2, the guide groove 2 includes two symmetrically arranged guide grooves 2, and a pair of clamping connecting rods 31 of the lever movable bracket 3 are respectively inserted into the two guide grooves 2 from the left and right sides.

[0033] Each guide groove 2 includes a mounting slot 21 and a movable slot 22. During actual assembly, the mounting slot 21 is set towards the float 5, while the movable slot 22 is set in a position away from the float 5, which can form a movable space for the lever movable bracket 3 to move up and down.

[0034] More specifically, the size of the movable slot 22 is larger than that of the clamping slot 21, which can realize a certain leverage effect of the ejector pin 1. Under the premise that the lever movable bracket 3 is clamped in the guide mating slot 2, the clamping link 31 can have more sufficient movement space in the movable slot 22 with the smaller clamping slot 21 as the base point, thereby ensuring the smooth and stable up and down movement of the clamping link 31.

[0035] The arc-shaped groove 23 located at the top between the mounting slot 21 and the movable slot 22 provides a smooth transition for the clamping connecting rod 31 in the guide mating groove 2.

[0036] The downward-sloping beveled groove 24 at the bottom of the movable groove 22 can form a guide slope at the bottom of the guide mating groove 2, which can provide more clearance space for the lever movable bracket 3 to rise in the guide mating groove 2, further ensuring the rising height of the float 5 in the valve body and ensuring the sealing effect of the ejector pin 1.

[0037] The arc-shaped groove 23 extends upward from the clamping slot 21 to the movable slot 22. The upward-sloping arc forms a smooth transition slope. When the float 5 floats up and pushes the lever movable bracket 3, the clamping link 31 can move along the arc, which can more efficiently convert the horizontal rotational force into the vertical upward lifting force, making the action transition smoother and reducing the risk of jamming.

[0038] The tops of the oblique groove 24 and the arc-shaped groove 23 are vertically opposite each other, which defines the vertical range of the activity space and ensures that the ejector pin 1 has a sufficient and reasonable lifting stroke. On the one hand, it can completely and reliably block the vent hole, and on the other hand, it can keep the clamping link 31 at the top of the arc-shaped groove 23 when the float 5 is sinking.

[0039] The guide groove 2 is symmetrically arranged on the left and right sides of the needle bar 11 along the axial direction, and the arc-shaped groove surface 23 and the oblique groove surface 24 are mirror-symmetrical about the axis of the needle bar 11.

[0040] This configuration ensures the symmetry of the force application point, allowing the ejector pin 1 to be subjected to uniform force during its ascent and descent, thus avoiding problems such as uneven wear and jamming caused by uneven load, resulting in smoother operation.

[0041] In addition to the aforementioned arc-shaped groove surface 23 and oblique-cut groove surface 24, the guide mating groove 2 also includes a vertical cut surface 25 located on the needle rod 11. The vertical cut surface 25 is positioned between the clamping slot 21 and the movable slot 22, and the clamping connecting rod 31 makes line-to-surface contact with the vertical cut surface 25. The outer wall of the clamping connecting rod 31 is specifically in tangential contact with the vertical cut surface 25, forming a line-to-surface clamping state. Combined with the clamping force of the lever movable bracket 3 at the guide mating groove 2, this greatly enhances the torsional resistance of the ejector pin 1 and completely solves the problem of the ejector pin 1 rotating on its own.

[0042] The exhaust valve pin 1 in this invention can ensure the direct and effective transmission of action to the greatest extent and avoid the risk of jamming.

[0043] This utility model also provides a steam exhaust valve, including a valve body, a valve cover 4, and the steam exhaust valve pin 1 described above.

[0044] The valve cover 4 is detachably connected to the valve body via a threaded connection, which facilitates the assembly of the internal structure of the valve body. A vent port is provided on the valve cover 4, and a vent nozzle 41 is connected to the vent port. The vent valve pin 1 passes vertically through the vent port and is inserted into the vent nozzle 41. At the same time, regardless of whether there is no water float in the valve body or a water float in the valve body, a part of the upper part of the pin 1 is limited and installed in the vent nozzle 41.

[0045] The vent nozzle 41 is provided with a sealing gasket 43, and the sealing gasket 43 is provided with a vent hole 44. The vent valve pin 1 includes a pointed cone 12 located at the top that can lift and block the vent hole 44.

[0046] With this configuration, steam can be released through the vent hole 44 before the ejector pin 1 is fully lifted, and the vent hole 44 can be sealed automatically after being lifted and blocked by the cone 12 after being fully lifted.

[0047] The valve body is equipped with a float ball 5. The top of the float ball 5 is connected to the lever movable bracket 3, which enables the float ball 5 to drive the lever movable bracket 3 to rise and fall. The lever movable bracket 3 is made of bent metal rod and includes a connecting rod 32 located in the middle. The top of the float ball 5 is equipped with a snap-fit ​​flap 51. The connecting rod 32 is snapped into the snap-fit ​​flap 51 to realize the connection between the lever movable bracket 3 and the float ball 5.

[0048] The clamping connecting rod 31 is located on both sides of the connecting rod 32 and is clamped in the guide groove 2. The clamping connecting rod 31 has outwardly bent connecting ends 33 on both sides. The inner wall of the valve cover 4 is provided with mounting ears 42, which are provided with through holes. The connecting ends 33 are installed through the through holes. On the one hand, the lever movable bracket 3 is hinged on the valve cover 4. On the other hand, the lever movable bracket 3 can be flipped based on the mounting ears 42. Combined with the clamping connecting rod 31 being clamped in the guide groove 2, the lifting action can be effectively transmitted, ensuring the effective and reliable movement of the exhaust valve pin 1.

[0049] The exhaust valve pin 1 in this utility model has a stable and vertical movement trajectory, which can accurately align and seal the exhaust hole 44, reducing the risk of leakage or sealing failure caused by misalignment, and improving the product performance and service life of the exhaust valve.

[0050] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0051] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A steam exhaust valve pin, which is fitted into a lever movable bracket, characterized in that, The exhaust valve pin includes a pin rod, and the lever movable bracket includes a pair of spaced clamping links. The bottom of the pin rod is provided with two guide grooves for the clamping links to be engaged and moved. The lever movable bracket is clamped between the two guide grooves, and the guide grooves are provided with a movable space that allows the lever movable bracket to move up and down.

2. The exhaust valve pin according to claim 1, characterized in that, The guide groove includes a snap-fit ​​groove and a movable groove. An arc-shaped groove surface is provided at the top between the snap-fit ​​groove and the movable groove. A downward-sloping oblique groove surface is provided at the bottom of the movable groove.

3. The exhaust valve pin according to claim 2, characterized in that, The arc-shaped groove surface extends upwards and slopes from the mounting slot towards the movable slot.

4. The exhaust valve pin according to claim 2, characterized in that, The top of the oblique groove is vertically opposite to the top of the arc-shaped groove.

5. The exhaust valve pin according to claim 2, characterized in that, The guide grooves are symmetrically arranged on the left and right sides along the axial direction of the needle bar, and the arc-shaped groove surface and the oblique groove surface are mirror-symmetrical about the axis of the needle bar.

6. The exhaust valve pin according to claim 2, characterized in that, The guide groove includes a vertical cut surface located on the needle bar. The vertical cut surface is disposed between the clamping slot and the movable slot, and the clamping connecting rod is in line-plane contact with the vertical cut surface.

7. A steam exhaust valve, characterized in that, It includes a valve body, a valve cover, and a vent valve pin as described in any one of claims 1-6.

8. The exhaust valve according to claim 7, characterized in that, The valve cover is provided with a vent port, the vent port is connected to a vent nozzle, the vent valve pin passes vertically through the vent port and is inserted into the vent nozzle, the vent nozzle is provided with a sealing gasket, the sealing gasket is provided with a vent hole, and the vent valve pin includes a pointed cone at the top that can lift and block the vent hole.

9. The exhaust valve according to claim 7, characterized in that, The valve body is equipped with a float ball, and the top of the float ball is connected to the lever movable bracket; The lever-movable support is made of bent metal rods and includes a connecting rod in the middle. The top of the float is provided with a snap-fit ​​flap, and the connecting rod is snapped into the snap-fit ​​flap.

10. The exhaust valve according to claim 9, characterized in that, The clamping connecting rods are arranged on both sides of the connecting rod and are clamped in the guide groove; The clamping connecting rod has outwardly bent connecting ends on both sides, and the inner side wall of the valve cover has mounting ears with through holes. The connecting ends are inserted and installed in the through holes.

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