A split seal valve

Abstract

The utility model discloses a kind of open type sealing valves, including valve body and the valve stem of movable installation in the top of valve body, rotary lifting operating mechanism is arranged on the valve stem, the left and right ends of the valve body are flange-connected with connecting pipe;The valve body inner chamber is provided with the valve core of elastic material;Sealing ring block is provided in the side of connecting pipe close to valve body, the left and right sides of the valve core are equipped with sealing plug, and water inlet is communicated in front and back two sides, the valve stem extends to be connected with valve core;When rotary lifting operating mechanism drives valve stem to carry out rotating action, simultaneously drive valve core to rotate, realize the conduction of water inlet and connecting pipe or the closed switching of sealing plug to connecting pipe;When driving valve stem to descend, the elastic deformation of valve core under stress drives two sides sealing plug to move out, and sealing ring block is formed with closely adhering seal, the device has excellent sealing reliability, convenient operation and leakage protection ability, overall adaptation medium flow and the core demand of sealing blockage.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically a spreading-type sealing valve. Background Technology

[0002] Existing valves mostly rely on the contact of hard sealing surfaces (such as the gate and seat of a gate valve) or the compression of elastic sealing rings (such as the O-rings of traditional ball valves) for sealing. Hard sealing structures are prone to wear and tear during long-term opening and closing, leading to increased gaps between the sealing surfaces. Especially under high-pressure conditions, the erosion of the medium accelerates the damage to the sealing surfaces, resulting in seal failure. Elastic sealing rings, on the other hand, are limited by the temperature and pressure resistance of the material. Under high-temperature, corrosive media, or frequent operation scenarios, the sealing rings are prone to aging and deformation, thus losing their sealing ability. Utility Model Content

[0003] The purpose of this invention is to provide a spreading sealing valve to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an opening-type sealing valve, comprising a valve body and a valve stem movably mounted on the top of the valve body, wherein a rotary lifting operating mechanism is provided on the valve stem, and connecting pipes are flanged to both the left and right ends of the valve body; a valve core made of elastic material is provided in the inner cavity of the valve body; A sealing ring block is provided on the side of the connecting pipe near the valve body. Sealing plugs are provided on both sides of the valve core, and water inlets are provided on both the front and rear sides. The valve stem extends to connect with the valve core. When the rotary lifting operating mechanism drives the valve stem to rotate, it simultaneously drives the valve core to rotate, realizing the switching of the water inlet and the connecting pipe being connected or the sealing plugs closing the connecting pipe. When the valve stem is driven to descend, the valve core undergoes elastic deformation under force, causing the sealing plugs on both sides to move outward and form a tight seal with the sealing ring block.

[0005] Furthermore, a groove is provided at one end of the connecting pipe near the valve body, and the sealing ring block is movably embedded in the groove. An annular support is provided on the groove, and several springs are connected between the annular support and the sealing ring block to push the sealing ring block to move towards one side of the valve body. The cross-section of the sealing plug is a frustum structure, and the sealing ring block is provided with an inner frustum-shaped sealing surface that cooperates with the frustum-shaped sealing plug. When the valve core is deformed by pressure, the outer surface of the sealing plug expands radially and forms a contact seal with the sealing surface of the sealing ring block.

[0006] Furthermore, the outer circumferential surface of the annular support is provided with sealing filler to fill the gap between the annular support and the sealing ring block.

[0007] Furthermore, the rotary lifting mechanism includes a valve seat and an adjusting wheel. The valve seat is fixedly installed on the top of the valve body, and the valve stem is movably disposed inside the valve seat. A threaded rod is coaxially connected to the top of the valve seat with a bearing. The threaded rod forms a threaded engagement with the adjusting wheel. The adjusting wheel is rotatably disposed on the top of the valve seat. When it rotates, it can drive the threaded rod to lift the valve stem. A rotating rod extends from the top of the valve seat, pushing the rotating rod to rotate synchronously to drive the valve stem to rotate, thereby realizing the opening and closing switching of the valve core.

[0008] Furthermore, a lower tube seat is detachably provided at the bottom end of the valve body; a support rod is rotatably connected to the middle of the lower tube seat, and the top end of the support rod is detachably connected to the middle of the bottom end of the valve core, for rotating to support the valve core and holding the bottom of the valve core.

[0009] Compared with the prior art, the beneficial effects of this utility model are: 1. Outstanding sealing performance: This device adopts the synergistic effect of elastic deformation valve core and conical sealing pair: the valve core is driven to expand radially by the rotary lifting operating mechanism, so that the frustum-shaped sealing plug and the spring-preloaded sealing ring block form a wedge-shaped sealing cone with a self-tightening effect. The positive pressure of the sealing surface increases synchronously with the deformation pressure, making the seal more stable; the pre-compression spring continuously pushes the sealing ring block and the sealing plug to maintain initial contact, avoiding initial leakage caused by gaps.

[0010] 2. Clear operating logic: The valve core is rotated by a lever to switch between opening and closing, and the valve stem is raised and lowered by an adjusting wheel to complete sealing or reset. The two operations are independent and smoothly linked. The valve core has an elastic reset design, which ensures a stable state when open and no jamming during rotation. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of a spreading-type sealing ball valve according to the present invention; Figure 2 for Figure 1 Enlarged view of a section at point A in the middle; Figure 3 This is a schematic diagram of the valve core structure of this utility model; Figure 4 This is a schematic diagram of the valve stem rotation and lifting mechanism.

[0012] In the diagram, the components are: valve body-1, valve stem-2, connecting pipe-3, valve core-4, sealing ring block-5, sealing plug-6, water inlet-7, annular support-8, spring-9, sealing packing-10, valve seat-11, adjusting wheel-12, rotating rod-13, lower pipe seat-14, and support rod-15. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] like Figures 1 to 4 As shown, an openable sealing valve includes a valve body 1 and a valve stem 2 movably mounted on the top of the valve body 1. The valve stem 2 is provided with a rotary lifting operating mechanism. Both the left and right ends of the valve body 1 are flanged and connected to connecting pipes 3. The valve body 1 is provided with a valve core 4 made of elastic material. A sealing ring block 5 is provided on the side of the connecting pipe 3 near the valve body 1, and sealing plugs 6 are provided on the left and right sides of the valve core 4. Water inlets 7 are provided on the front and rear sides. The valve stem 2 extends to connect with the valve core 4. When the rotating lifting operating mechanism drives the valve stem 2 to rotate, it simultaneously drives the valve core 4 to rotate, realizing the switching of the water inlet 7 and the connecting pipe 3 to the sealing plugs 6 and the connecting pipe 3. When the valve stem 2 is driven to descend, the valve core 4 undergoes elastic deformation under force, causing the sealing plugs 6 on both sides to move outward and form a tight seal with the sealing ring block 5.

[0015] In this embodiment, a groove is provided at one end of the connecting pipe 3 near the valve body 1, and the sealing ring block 5 is movably embedded in the groove. An annular support 8 is provided on the groove, and several springs 9 are connected between the annular support 8 and the sealing ring block 5 to push the sealing ring block 5 to move towards one side of the valve body 1. The sealing plug 6 has a frustum cross-section, and the sealing ring block 5 has an inner frustum-shaped sealing surface that cooperates with the frustum-shaped sealing plug 6. When the valve core 4 is deformed by pressure, the outer surface of the sealing plug 6 expands radially and forms a contact seal with the sealing surface of the sealing ring block 5. A sealing filler 10 is provided on the outer circumferential surface of the annular support 8 to fill the gap between the annular support 8 and the sealing ring block 5 and prevent the medium from leaking from the mating surface of the annular support 8 and the sealing ring block 5.

[0016] The groove at one end of the connecting pipe 3 near the valve body 1 provides installation and positioning space for the sealing ring block 5. The annular support 8 is fixed in the groove, and several springs 9 between it and the sealing ring block 5 are always in a pre-compressed state. The elastic force of the springs 9 continuously pushes the sealing ring block 5 towards the valve body 1, so that the sealing ring block 5 and the sealing plug 6 maintain the initial contact tendency, avoiding initial leakage caused by gaps.

[0017] In this embodiment, the rotary lifting mechanism includes a valve seat 11 and an adjusting wheel 12. The valve seat 11 is fixedly installed on the top of the valve body 1, and the valve stem 2 is movably disposed inside the valve seat 11. A threaded rod is coaxially connected to the top of the valve seat 11, and the threaded rod forms a threaded engagement with the adjusting wheel 12. The adjusting wheel 12 is rotatably disposed on the top of the valve seat 11, and when it rotates, it can drive the threaded rod to lift the valve stem 2. A rotating rod 13 extends from the top of the valve seat 11, and pushing the rotating rod 13 to rotate synchronously drives the valve stem 2 to rotate, thereby realizing the opening and closing switching of the valve core 4.

[0018] In this embodiment, a lower tube seat 14 is detachably provided at the bottom end of the valve body 1; a support rod 15 is rotatably connected to the middle of the lower tube seat 14, and the top end of the support rod 15 is detachably connected to the middle of the bottom end of the valve core 4, which is used to rotate and support the valve core 4 and hold the bottom of the valve core 4. When the valve core 4 needs to be repaired, the lower tube seat 14 at the bottom end of the valve body 1 can be removed, and the valve core 44 can be maintained from the bottom end of the valve body 1.

[0019] The working principle of this embodiment is as follows: The sealing plug 6 adopts a frustum structure, and the sealing ring block 5 is correspondingly provided with an inner frustum-shaped sealing surface. This "conical surface fit" structure forms a wedge-shaped sealing pair. When the valve core 4 is driven to undergo elastic deformation, the sealing plug 6 moves outward with the expansion of the valve core 4. Its frustum-shaped outer surface makes surface contact with the inner frustum-shaped sealing surface of the sealing ring block 5. As the deformation pressure of the valve core 4 increases, the positive pressure between the two conical surfaces increases synchronously. Combined with the self-tightening effect of the conical surface, a more reliable sealing effect than planar contact is achieved, effectively preventing the medium from penetrating from the sealing surface.

[0020] When the ball valve needs to be closed, first rotate the lever 13 to rotate the valve stem 2, which in turn rotates the valve core 4, causing the sealing plug 6 to rotate to the same side as the connecting pipe 3. Then, rotate the adjusting wheel 12, and through the threaded engagement between the threaded rod and the adjusting wheel 12, drive the valve stem 2 to move downward. The bottom end of the valve stem 2 applies downward pressure to the valve core 4. Since the valve core 4 is made of an elastic deformation material, the pressure causes the valve core 4 to expand radially, driving the sealing plugs 6 on both sides to move outward synchronously.

[0021] During the movement of the sealing plug 6, on the one hand, its frustum-shaped outer surface forms a wedge-shaped fit with the inner frustum-shaped sealing surface of the sealing ring block 5, achieving the main seal under the deformation pressure of the valve core 4; on the other hand, the sealing plug 6 pushes the sealing ring block 5 to compress the spring 9, and the reaction force of the spring 9 further enhances the fitting pressure of the sealing surface.

[0022] After sealing is completed, if the ball valve needs to be opened, first rotate the adjusting wheel 12 in the opposite direction so that the valve stem 2 rises and the valve core 4 returns to its original position due to its own elasticity. The sealing plug 6 and the sealing ring block 5 are in slight contact. Then rotate the top rotating rod 13 in the opposite direction to drive the valve core 4 to rotate. When the valve core 4 rotates until its through-hole 7 is aligned with the axis of the connecting pipes 3 on both sides, the medium can flow through the through-hole 7 between the connecting pipes 3, thus opening the ball valve.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A type of expanding sealing valve, characterized in that: The valve includes a valve body and a valve stem movably mounted on the top of the valve body. The valve stem is equipped with a rotary lifting operating mechanism. Both ends of the valve body are flanged and connected to connecting pipes. The valve body cavity is equipped with a valve core made of elastic material. A sealing ring block is provided on the side of the connecting pipe near the valve body. Sealing plugs are provided on both sides of the valve core, and water inlets are provided on both the front and rear sides. The valve stem extends to connect with the valve core. When the rotary lifting operating mechanism drives the valve stem to rotate, it simultaneously drives the valve core to rotate, realizing the switching of the water inlet and the connecting pipe being connected or the sealing plugs closing the connecting pipe. When the valve stem is driven to descend, the valve core undergoes elastic deformation under force, causing the sealing plugs on both sides to move outward and form a tight seal with the sealing ring block.

2. The expansion-type sealing valve according to claim 1, characterized in that: The connecting pipe has a groove at one end near the valve body. The sealing ring block is movably embedded in the groove. An annular support is provided on the groove, and several springs are connected between the annular support and the sealing ring block to push the sealing ring block to move towards one side of the valve body. The sealing plug has a frustum cross-section. The sealing ring block has an inner frustum-shaped sealing surface that mates with the frustum-shaped sealing plug. When the valve core is deformed by pressure, the outer surface of the sealing plug expands radially and forms a contact seal with the sealing surface of the sealing ring block.

3. The expansion-type sealing valve according to claim 2, characterized in that: The outer circumferential surface of the annular support is provided with sealing filler to fill the gap between the annular support and the sealing ring block.

4. The expansion-type sealing valve according to claim 1, characterized in that: The rotary lifting mechanism includes a valve seat and an adjusting wheel. The valve seat is fixedly installed on the top of the valve body, and the valve stem is movably disposed inside the valve seat. A threaded rod is coaxially connected to the top of the valve seat with a bearing. The threaded rod and the adjusting wheel form a threaded engagement. The adjusting wheel is rotatably disposed on the top of the valve seat. When it rotates, it can drive the threaded rod to lift the valve stem. A rotating rod extends from the top of the valve seat, which pushes the rotating rod to rotate synchronously to drive the valve stem to rotate, thereby realizing the opening and closing switching of the valve core.

5. The expansion-type sealing valve according to claim 1, characterized in that: The bottom end of the valve body is detachably provided with a lower tube seat; a support rod is rotatably connected to the middle of the lower tube seat, and the top end of the support rod is detachably connected to the middle of the bottom end of the valve core, which is used to rotate and support the valve core and hold the bottom of the valve core.

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