Quick manual blowdown valve for boiler

Abstract

This application discloses a boiler quick manual blowdown valve. When the valve stem is at its highest position, the pressure ring and the lower support ring abut against each other, the lower support ring is pressed against the packing, and the locking ring abuts against the cover. The packing provides excellent sealing, but also offers significant resistance to valve stem movement. As the valve stem moves downward from its highest position, the pressure ring and the lower support ring separate, and the packing cover moves upward under the action of the elastic element. At this time, the sealing effect provided by the packing decreases, and the resistance to valve stem movement decreases. When the valve stem is at its lowest position, the abutment block overcomes the elastic force of the elastic element and presses down on the packing cover. At this time, the packing provides excellent sealing, but also offers significant resistance to valve stem movement. The boiler quick manual blowdown valve provided by this invention achieves optimal sealing in both the open and closed working positions. During the rapid movement of the valve stem, the resistance between the packing and the valve stem is reduced, allowing for rapid valve stem operation while minimizing damage to the packing.

Description

Technical Field

[0001] This invention relates to the field of valves, and in particular to a quick manual blowdown valve for boilers. Background Technology

[0002] In existing technology, the boiler quick manual blowdown valve, as a key functional component specifically designed for boiler systems, has the core function of efficiently and rapidly draining accumulated wastewater, impurities, and various sediments from inside the boiler. This valve is generally operated manually, relying on a simple and reliable mechanical structure to quickly open and close, thereby effectively ensuring the safe and stable operation of the boiler system and its overall working efficiency. Regular use of this valve can promptly remove sludge, scale, and other harmful impurities accumulated at the bottom of the boiler, preventing these substances from causing blockages in boiler pipes or accelerating equipment corrosion, significantly extending the boiler's service life. Simultaneously, the blowdown valve helps regulate and optimize water quality parameters within the boiler, ensuring that the water quality meets operating standards and keeping the boiler in optimal working condition. Furthermore, in emergencies, such as when it is necessary to quickly reduce the internal pressure of the boiler or drain liquid, the manual blowdown valve plays a crucial role in promptly eliminating risks and ensuring the safety of the entire equipment.

[0003] Boiler quick manual drain valves are characterized by their ease of operation and rapid response, making them suitable for applications requiring manual operation and real-time control. Compared to automatic drain valves, manual drain valves not only have lower purchase costs but also offer more convenient daily maintenance, eliminating the need for complex electrical or automation systems and reducing overall system operating costs. They typically employ a handle-driven structure, enabling rapid valve stem movement. Therefore, conventional methods of fixing the packing at the valve stem position cannot meet sealing requirements. For example, to achieve a seal, the packing may be compressed by a gland with significant pressure, interfering with the rapid movement of the valve stem and negatively impacting the packing's condition during stem movement. Summary of the Invention

[0004] The main objective of this invention is to provide a quick manual blowdown valve for boilers, which aims to solve the problem that, in order to achieve a sealing effect, the packing is compressed by the gland with a large pressure, which interferes with the rapid movement of the valve stem and also negatively affects the state of the packing during the movement of the valve stem.

[0005] To achieve the above objectives, the present invention provides a boiler quick manual blowdown valve, comprising:

[0006] The valve body has a flow channel with a valve seat in the middle extending through it along its length, and a valve cover seat corresponding to the valve seat is provided on the outer wall of the valve body.

[0007] A valve cover is installed on the valve cover seat and a mounting post is provided through the central axis. The mounting post includes a first post, a second post, a third post and a fourth post with increasing diameter arranged sequentially from bottom to top.

[0008] A cap is attached to the top of the valve cover;

[0009] The packing section includes packing, a lower support ring, and a packing cover. The lower support ring is disposed at the bottom of the third column, the packing is disposed on the lower support ring, the packing cover extends into the third column to compress the packing, and an elastic element is clamped between the portion of the packing cover protruding from the mounting column and the cover head. A locking ring is provided on the outer wall of the packing cover corresponding to the fourth column.

[0010] The valve stem portion includes a valve stem that slides through the valve cover and matches the first column section. The top and bottom of the valve stem are respectively connected to a support block and a valve core. A pressure ring is provided on the valve stem corresponding to the second column section.

[0011] A bracket is installed on the valve cover, and the abutment block is slidably disposed on the bracket;

[0012] A helical spring is mounted on the bracket and its lower end is supported by the abutment block;

[0013] The handle is hinged to the bracket at its midpoint along its length and to the upper end of the valve stem at its inner end.

[0014] When the valve stem is on top, the pressure ring abuts against the lower support ring, and the locking ring abuts against the cover; when the valve stem is on the bottom, the abutting block abuts against the cover, the locking ring and the valve cover are in clearance fit, the pressure ring and the valve cover are in clearance fit, and the valve core and the valve seat form a seal.

[0015] Furthermore, the packing portion also includes an upper support ring, and the packing cover presses the packing through the upper support ring, wherein the upper support ring, the packing, and the lower support ring are connected.

[0016] Furthermore, a pin is detachably provided corresponding to the handle. When the handle drives the valve stem to the highest position, the pin passes through the handle and fixes the handle to the bracket.

[0017] Furthermore, both the locking ring and the pressure ring are snap ring type structures.

[0018] Furthermore, the valve seat is mounted on the valve body.

[0019] Furthermore, the boiler quick manual blowdown valve also includes a pressure cage, which is clamped between the valve cover and the valve seat.

[0020] Furthermore, the cover has a connecting structure in the circumferential direction.

[0021] Furthermore, the cover is connected to the valve cover flange.

[0022] Furthermore, the elastic element is a butterfly spring.

[0023] Furthermore, the inner end of the handle is hinged to the abutment block.

[0024] The boiler quick manual blowdown valve provided by this invention features a design where, when the valve stem is at its highest position, the pressure ring and lower support ring abut against each other, with the lower support ring pressed against the packing. The locking ring also abuts against the cover. At this position, the packing provides excellent sealing, but also offers significant resistance to valve stem movement. As the valve stem moves downward from its highest position, the pressure ring and lower support ring separate, and the packing cover moves upward under the action of the elastic element. At this point, the sealing effect provided by the packing decreases, and the resistance to valve stem movement also decreases. When the valve stem is at its lowest position, the abutment block overcomes the elastic force of the elastic element and presses down on the packing cover. At this point, the packing provides excellent sealing, but also offers significant resistance to valve stem movement. This design achieves optimal sealing in both the open and closed working positions. Furthermore, during rapid valve stem movement, the resistance between the packing and the valve stem decreases, allowing for rapid valve stem operation while minimizing damage to the packing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram (closed state) of the boiler quick manual drain valve according to the first embodiment of the present invention.

[0026] Figure 2 yes Figure 1 Enlarged view of section A in the middle;

[0027] Figure 3 yes Figure 1 Enlarged view of section B in the middle;

[0028] Figure 4 This is a schematic diagram of the valve cover in the boiler quick manual blowdown valve of the first embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the handle in the boiler quick manual drain valve of the first embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram (conducting state) of the boiler quick manual blowdown valve according to the first embodiment of the present invention.

[0031] Figure 7 yes Figure 6 Enlarged view of section C;

[0032] Figure 8 yes Figure 6 Enlarged view of section D in the middle.

[0033] Reference numerals: 100-valve body, 110-flow channel, 120-valve seat, 130-valve cover seat, 200-valve cover, 210-first section column, 220-second section column, 230-third section column, 240-fourth section column, 300-cover, 400-packing section, 410-packing, 420-lower support ring, 430-packing cover, 440-elastic element, 431-positioning ring, 510-valve stem, 511-pressure ring, 520-support block, 530-valve core, 600-bracket, 700-coil spring, 800-handle. Detailed Implementation

[0034] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0035] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connection or wireless coupling. The term “and / or” as used herein includes all or any of the units and all combinations of one or more associated listed items.

[0036] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0037] Reference Figures 1 to 8 In one embodiment of the present invention, a boiler quick manual drain valve includes:

[0038] The valve body 100 has a flow channel 110 through which a valve seat 120 is provided in the middle in the length direction, and a valve cover seat 130 corresponding to the valve seat 120 is provided on the outer wall of the valve body 100.

[0039] A valve cover 200 is installed on the valve cover seat 130 and a mounting post is provided through the central axis. The mounting post includes a first post 210, a second post 220, a third post 230 and a fourth post 240 with increasing diameter arranged sequentially from bottom to top.

[0040] The cap 300 is connected to the top of the valve cover 200;

[0041] The packing section 400 includes a packing 410, a lower support ring 420, and a packing cover 430. The lower support ring 420 is disposed at the bottom of the third column 230, the packing 410 is disposed on the lower support ring 420, and the packing cover 430 extends into the third column 230 to compress the packing 410. An elastic element 440 is clamped between the portion of the packing cover 430 exposed on the mounting column and the cover head 300. A locking ring 431 is provided on the outer wall of the packing cover 430 corresponding to the fourth column 240.

[0042] The valve stem portion includes a valve stem 510 that slides through the valve cover 200 and matches the first column 210. The top and bottom of the valve stem 510 are respectively connected to a support block 520 and a valve core 530. The valve stem 510 is provided with a pressure ring 511 corresponding to the second column 220.

[0043] A bracket 600 is installed on the valve cover 200, and the abutment block 520 is slidably disposed on the bracket 600;

[0044] A helical spring 700 is mounted on the bracket 600 and its lower end is supported by the abutment block 520;

[0045] The handle 800 is hinged to the bracket 600 at its midpoint along its length and to the upper end of the valve stem at its inner end.

[0046] When the valve stem is on top, the pressure ring 511 abuts against the lower support ring 420, and the locking ring 431 abuts against the cover 300; when the valve stem is on the bottom, the abutting block 520 abuts against the cover 300, the locking ring 431 and the valve cover 200 are in clearance fit, the pressure ring 511 and the valve cover 200 are in clearance fit, and the valve core 530 and the valve seat 120 form a seal.

[0047] In the existing technology, manual drain valves generally adopt a handle-driven structure to drive the valve stem to move quickly. Therefore, the conventional method of fixing the packing at the valve stem position cannot meet the sealing requirements. In order to achieve a sealing effect, the packing is compressed by the gland with a large pressure, which not only interferes with the rapid movement of the valve stem, but also has a negative impact on the state of the packing during the movement of the valve stem.

[0048] The boiler quick manual drain valve provided by the present invention includes a valve body 100, a valve cover 200, a cover head 300, a packing part 400, a valve stem part, a bracket 600, a helical spring 700, and a handle 800.

[0049] A flow channel 110 with a valve seat 120 disposed in the middle extends through the length of the valve body 100. The specific structure and installation method of the flow channel 110 and the valve seat 120 are not the focus; refer to commonly used implementation methods. A valve cover seat 130 corresponding to the valve seat 120 is disposed on the outer wall of the valve body 100.

[0050] The valve cover 200 is mounted on the valve cover seat 130, and a mounting post runs through its central axis. The mounting post includes a first post 210, a second post 220, a third post 230, and a fourth post 240 arranged sequentially from bottom to top with increasing diameters. The specific diameter increments are selected and designed according to the actual application scenario. The cover head 300 is connected to the top of the valve cover 200, thereby covering the fourth post 240.

[0051] The packing section 400 includes packing 410, a lower support ring 420, and a packing cap 430. The lower support ring 420 is located at the bottom of the third column 230. The material of the lower support ring 420 is preferably an alloy such as stainless steel. The packing 410 is mounted on the lower support ring 420. The packing cap 430 extends into the third column 230 to compress the packing 410. An elastic element 440 is held between the portion of the packing cap 430 exposed on the mounting column and the cap head 300. The elastic element 440 can be in the form of a disc spring or the like. A retaining ring 431 is provided on the outer wall of the packing cap 430 corresponding to the fourth column 240. The retaining ring 431 can be integrally formed with the packing cap or a connecting structure in the form of a retaining spring or the like.

[0052] The valve stem portion includes a valve stem 510 that slides through the valve cover 200 and matches the first post 210. The valve stem 510 passes through the cover head 300, the fourth post 240, the third post 230, the second post 220, and the first post 210, and enters the valve body 100. The valve stem 510 and the first post 210 of the valve cover 200 form a matching seal. The top and bottom of the valve stem 510 are respectively connected to a retaining block 520 and a valve core 530. A pressure ring 511 is provided on the valve stem 510 corresponding to the second post 220.

[0053] The bracket 600 is mounted on the valve cover 200. The abutment block 520 is slidably disposed on the bracket 600. For example, the bracket 600 is provided with a columnar groove structure in the height direction, and the abutment block 520 can slide in the height direction within the groove structure.

[0054] The helical spring 700 is mounted on the bracket 600 and its lower end is supported by the abutment block 520. For example, the helical spring 700 is mounted in a columnar groove structure, and its lower end is supported by the abutment block 520.

[0055] The handle 800 is hinged to the bracket 600 at its midpoint along its length, allowing the handle 800 to rotate with the bracket 600 as a fixed base. The inner end of the handle 800 is hinged to the upper end of the valve stem, driving the valve stem to move up and down.

[0056] The hinge position at the inner end of the handle 800 can be either the valve stem 510 or the abutment block 520. The hinge position of the handle 800 can be provided in the form of a slotted hole, etc., so as to realize a certain movement and meet the usage requirements. For example, the inner end of the handle 800 is provided with a slotted hole, and it is hinged to the abutment block 520 through the slotted hole, so that the handle 800 can remain connected during the movement of the abutment block 520.

[0057] During the work process:

[0058] When the valve stem is at its highest position, the valve is in the open state. The pressure ring 511 abuts against the lower support ring 420, and the lower support ring 420 is pressed against the packing 410. The locking ring 431 abuts against the cover 300. At this time, the packing 410 provides excellent sealing effect, while also providing greater resistance to the movement of the valve stem 510.

[0059] As the valve stem moves downward from its highest position, the pressure ring 511 separates from the lower support ring 420, and the packing cover 430 moves upward under the action of the elastic element 440. At this time, the sealing effect provided by the packing 410 is reduced, and the resistance to the movement of the valve stem 510 is reduced.

[0060] When the valve stem is at its lowest position, the valve is closed. The locking ring 431 and the valve cover 200 are in clearance fit in the height direction, without interfering with the holding block 520 overcoming the elastic force of the elastic element 440 to press down the packing cover 430. At this time, the packing 410 provides excellent sealing effect, while also providing greater resistance to the movement of the valve stem 510.

[0061] In summary, when the valve stem is at its highest position, the pressure ring 511 abuts against the lower support ring 420, which is pressed against the packing 410. The retaining ring 431 abuts against the cover 300. At this time, the packing 410 provides excellent sealing, but also offers significant resistance to the movement of the valve stem 510. As the valve stem moves downward from its highest position, the pressure ring 511 separates from the lower support ring 420, and the packing cover 430 moves upward under the action of the elastic element 440. At this time, the sealing effect provided by the packing 410 decreases, and the resistance to the movement of the valve stem 510 is reduced. The resistance to the movement of valve stem 510 is reduced; when the valve stem is at its lowest position, the holding block 520 overcomes the elastic force of the elastic element 440 and presses down on the packing cover 430. At this time, the packing 410 provides a superior sealing effect, while the resistance to the movement of valve stem 510 is relatively large. This achieves the best sealing effect in both the open and closed working positions. During the rapid movement of valve stem 510, the resistance between packing 410 and valve stem 510 is reduced, and the valve stem 510 operates quickly while reducing damage to packing 410.

[0062] In one embodiment, the packing portion 400 further includes an upper support ring, and the packing cover 430 presses the packing 410 through the upper support ring, wherein the upper support ring, the packing 410 and the lower support ring 420 are connected.

[0063] In this embodiment, an upper support ring is added to make the compression of the packing 410 by the packing cap 430 more uniform. The upper support ring, packing 410, and lower support ring 420 are connected as a whole to facilitate their installation. The connection method between the upper support ring, packing 410, and lower support ring 420 can be varied, such as adhesive bonding or mechanical connection, depending on the material of the packing 410.

[0064] In one embodiment, a pin is detachably provided corresponding to the handle 800. When the handle 800 drives the valve stem to the highest position, the pin passes through the handle 800 and fixes the handle 800 to the bracket 600.

[0065] In this embodiment, since the handle 800 acts on the packing 410 when the valve stem is driven to the highest position, a large force needs to be applied to the handle 800. Therefore, a pin is added so that the specific working position of the handle 800 can be fixed, reducing the workload of the operation process.

[0066] In one embodiment, both the locking ring 431 and the pressure ring 511 are snap ring type structures.

[0067] In this embodiment, both the locking ring 431 and the pressure ring 511 are set as snap ring type structures, which reduces material consumption during the processing compared to integrally forming the locking ring 431.

[0068] In one embodiment, the valve seat 120 is mounted on the valve body 100.

[0069] In this embodiment, the valve seat 120 is designed to be detachable, so that during use and maintenance, the valve seat 120 can be replaced to maintain its optimal working condition. The valve seat 120 can be fixed to the valve body 100 by means of threaded connection or the like.

[0070] In one embodiment, the boiler quick manual blowdown valve further includes a pressure cage, with the valve seat 120 pressure cage clamped between the valve cover 200 and the valve seat 120.

[0071] In this embodiment, the installation method of the valve seat 120 is limited to improve the convenience of installation while ensuring stability. Specifically, during the installation of the valve cover 200, the pressure cage is pressed down, thereby fixing the valve seat 120 in the corresponding position of the valve body 100.

[0072] In one embodiment, the cover 300 is a connecting structure in the circumferential direction.

[0073] In this embodiment, the cap 300 is broken in the circumferential direction to facilitate installation. Otherwise, the structure of the packing cap 430 would need to be designed accordingly (e.g., the packing cap 430 would be set as a split structure) to provide a location for the installation of the cap 300.

[0074] In one embodiment, the cover 300 is flange-connected to the valve cover 200.

[0075] In this embodiment, limiting the cover 300 to a flange connection has the advantages of simplicity and stability.

[0076] In one embodiment, the elastic element 440 is a butterfly spring.

[0077] In this embodiment, the elastic element 440 is limited to a butterfly spring, providing a large elastic force within a small deformation range. The number of butterfly springs is not limited; for example, the elastic element 440 may include multiple stacked butterfly springs.

[0078] In one embodiment, the inner end of the handle 800 is hinged to the abutment block 520.

[0079] In this embodiment, since the abutment block 520 needs to interact with the packing cover 430, resulting in a large structural size, it is difficult to form a structural relationship between the handle 800 and the valve stem 510. Therefore, the connection position of the inner end of the handle 800 is limited to the abutment block 520.

[0080] In summary, the boiler quick manual blowdown valve provided by this invention, when the valve stem is at its highest position, the pressure ring 511 abuts against the lower support ring 420, the lower support ring 420 is pressed against the packing 410, and the locking ring 431 abuts against the cover 300. At this time, the packing 410 provides excellent sealing performance, while also providing significant resistance to the movement of the valve stem 510. During the downward movement of the valve stem from its highest position, the pressure ring 511 separates from the lower support ring 420, and the packing cover 430 moves upward under the action of the elastic element 440. At this time, the packing 410 provides... The sealing effect is reduced, and the resistance to the movement of the valve stem 510 is reduced. When the valve stem is in the lowest position, the holding block 520 overcomes the elastic force of the elastic element 440 and presses down on the packing cover 430. At this time, the packing 410 provides a superior sealing effect, but at the same time, the resistance to the movement of the valve stem 510 is relatively large. This achieves the best sealing effect in both the open and closed working positions. During the rapid movement of the valve stem 510, the resistance between the packing 410 and the valve stem 510 is reduced. The valve stem 510 operates quickly while reducing damage to the packing 410.

[0081] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A quick manual blowdown valve for boilers, characterized in that, include: The valve body has a flow channel with a valve seat in the middle extending through it along its length, and a valve cover seat corresponding to the valve seat is provided on the outer wall of the valve body. A valve cover is installed on the valve cover seat and a mounting post is provided through the central axis. The mounting post includes a first post, a second post, a third post and a fourth post with increasing diameter arranged sequentially from bottom to top. A cap is attached to the top of the valve cover; The packing section includes packing, a lower support ring, and a packing cover. The lower support ring is disposed at the bottom of the third column, the packing is disposed on the lower support ring, the packing cover extends into the third column to compress the packing, and an elastic element is clamped between the portion of the packing cover protruding from the mounting column and the cover head. A locking ring is provided on the outer wall of the packing cover corresponding to the fourth column. The valve stem portion includes a valve stem that slides through the valve cover and matches the first column section. The top and bottom of the valve stem are respectively connected to a support block and a valve core. A pressure ring is provided on the valve stem corresponding to the second column section. A bracket is installed on the valve cover, and the abutment block is slidably disposed on the bracket; A helical spring is mounted on the bracket and its lower end is supported by the abutment block; The handle is hinged to the bracket at its midpoint along its length and to the upper end of the valve stem at its inner end. When the valve stem is on top, the pressure ring abuts against the lower support ring, and the locking ring abuts against the cover; when the valve stem is on the bottom, the abutting block abuts against the cover, the locking ring and the valve cover are in clearance fit, the pressure ring and the valve cover are in clearance fit, and the valve core and the valve seat form a seal.

2. The boiler quick manual drain valve according to claim 1, characterized in that, The packing section further includes an upper support ring, and the packing cover presses the packing through the upper support ring, wherein the upper support ring, the packing, and the lower support ring are connected.

3. The boiler quick manual drain valve according to claim 1, characterized in that, A pin is detachably provided for the handle. When the handle drives the valve stem to the highest position, the pin passes through the handle and fixes the handle to the bracket.

4. The boiler quick manual drain valve according to claim 1, characterized in that, Both the locking ring and the pressure ring are snap ring type structures.

5. The boiler quick manual drain valve according to claim 1, characterized in that, The valve seat is mounted on the valve body.

6. The boiler quick manual drain valve according to claim 5, characterized in that, The boiler quick manual blowdown valve also includes a pressure cage, which is clamped between the valve cover and the valve seat.

7. The boiler quick manual drain valve according to claim 1, characterized in that, The cover has a connecting structure in the circumferential direction.

8. The boiler quick manual drain valve according to claim 7, characterized in that, The cover is connected to the valve cover flange.

9. The boiler quick manual blowdown valve according to any one of claims 1 to 8, characterized in that, The elastic element is a butterfly spring.

10. The boiler quick manual blowdown valve according to any one of claims 1 to 8, characterized in that, The inner end of the handle is hinged to the abutment block.

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