Sealing rust-proof structure of valve screw

Abstract

The utility model provides a sealing rust-proof structure of a valve screw, which relates to the field of underwater valves and comprises a spring, a rubber sealing sleeve and a sealing ring. A valve body is adhered to the outer side surface of the sealing ring; the top end of the valve body is connected with a valve cover through a fixing bolt and a fixing nut, a sealing bottom cover is screwed to the top end of the valve cover, a supporting sleeve is welded to the upper side face of the sealing bottom cover, a top cover is slidably connected to the inner side face of the supporting sleeve, and a connecting pipe adheres to the bottom end of the top cover. A sealing bottom cover is adhered to the bottom end of the connecting pipe; a threaded rod is welded to the bottom end of the spring, a top block is welded to the top end of the spring, and the top block is bonded with the rubber sealing sleeve; through the arrangement of the connecting pipe, the spring, the top block, the top cover and the sealing bottom cover, the threaded rod and the external water body are sealed and separated, the threaded rod is prevented from being eroded by oxidizing substances in the water body, and the problem that a screw rod is rusted and damaged due to the fact that threads of a screw rod component in a traditional screw rod valve are exposed in an external water soaking environment of a valve body is solved.

Description

Technical Field

[0001] The utility model belongs to the field of underwater valves, and more specifically, particularly relates to a sealing and rust-proof structure of a valve screw. Background Art

[0002] Valves are control components in fluid delivery systems, used to open and close pipelines, control flow direction, and adjust and control the parameters of the delivery medium. According to the valve function, they can be divided into shut-off valves, check valves, regulating valves and other types. At present, screw valves are a common mechanical transmission structure for controlling valve operation. The principle of screw valves is based on the rotation of the screw, and the opening and closing of the valve is controlled by the lifting and lowering of the thread, thereby achieving control of the fluid. However, the screw component of the traditional screw valve needs to be lifted and lowered, so there is a thread structure on the outer side of the screw component that extends out of the valve body, exposing the thread structure to the external environment. If the screw valve is immersed in water, the thread structure will be attacked by oxidizing substances in the water for a long time, causing the thread structure to rust and damage, resulting in the inability of the thread on the outer side of the screw to mesh with the valve nut, resulting in failure of the screw valve control. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a sealing and rust-proof structure for a valve screw to solve the problem that the threads of the screw components in a traditional screw valve are exposed to the water environment outside the valve body, causing the screw to rust and be damaged.

[0004] The utility model provides a sealing and rust-proof structure for a valve screw, comprising a handwheel; a threaded rod is installed at the bottom end of the handwheel, the bottom end of the threaded rod is rotatably connected to the valve stem, and the bottom end of the valve stem is bonded with a plunger; it also comprises a spring, a rubber sealing sleeve and a sealing ring; the outer side surface of the sealing ring is bonded with a valve body; the top end of the valve body is connected to a valve cover by a fixing bolt and a fixing nut, the top end of the valve cover is screwed with a sealing bottom cover, the upper side surface of the sealing bottom cover is welded with a supporting sleeve, the inner side surface of the support sleeve is slidably connected with a top cover, and the bottom end of the top cover is bonded with a connecting pipe; a small threaded through hole is provided on the upper side surface of the valve cover, and an oil sealing bolt is screwed into the small threaded through hole of the valve cover; the bottom end of the connecting pipe is bonded with a sealing bottom cover; the bottom end of the spring is welded with a threaded rod, the top end of the spring is welded with a top block, and the top block is bonded to the rubber sealing sleeve.

[0005] In at least some embodiments, the top block is a disc-shaped structure, and the upper side surface of the disc-shaped structure of the top block is provided with four groups of annular convex strips, and the annular convex strips are arranged equidistantly inside and outside. A through hole is provided at the center of the top block disk, and the non-threaded surface of the outer side surface of the threaded rod is inserted into the through hole of the top block. An annular groove is provided on the hole wall on the inner side of the through hole of the top block, and a rubber sealing sleeve is bonded to the inner side surface of the annular groove, and the rubber sealing sleeve is nested in the non-threaded surface of the outer side surface of the threaded rod.

[0006] In at least some embodiments, the top cover is a cylindrical structure with an opening at the bottom, the outer side surface of the top cover is provided with two groups of convex strips, a through hole penetrating from top to bottom is provided at the center position of the upper side surface of the top cover, the outer side surface of the threaded rod has a non-threaded surface and is inserted into the through hole of the top cover, and the outer side of the top end of the through hole of the top cover and the outer side of the bottom end of the through hole are both provided with four groups of annular grooves equidistantly arranged from the inside to the outside, and the four groups of annular convex strip structures of the top block are embedded in the four groups of annular grooves on the outer side of the bottom end of the through hole of the top cover.

[0007] In at least some embodiments, the outer side surface of the threaded rod is provided with two groups of ring plates from top to bottom, the upper side surface of the lower ring plate of the threaded rod is welded with a spring, and the lower side surface of the upper ring plate of the threaded rod is provided with four groups of annular convex strips arranged equidistantly from the inside to the outside, and the four groups of annular convex strips at the upper ring plate of the threaded rod are embedded in four groups of annular grooves on the outer side of the top end of the top cover through hole.

[0008] In at least some embodiments, a cylindrical cavity structure is provided inside the valve cover, a large threaded through hole that passes through from top to bottom is provided at the center of the top end of the cylindrical cavity of the valve cover, the threaded surface on the outer side of the threaded rod is meshed and connected in the large threaded through hole of the valve cover, a through hole that passes through from top to bottom is provided at the center of the bottom end of the cylindrical cavity of the valve cover, the valve stem is inserted into the through hole of the valve cover, and anti-rust oil is filled inside the cylindrical cavity structure of the valve cover.

[0009] In at least some embodiments, the inner side surface of the support sleeve is provided with two groups of grooves symmetrically distributed on the left and right sides, and the convex strips on the outer side surface of the top cover are embedded in the grooves of the support sleeve.

[0010] In at least some embodiments, the connecting pipe is a corrugated hose made of silicone material, and the outer side of the connecting pipe is sealed and bonded to the inner side of the top cover cylinder structure near the top end, and the outer side of the connecting pipe is sealed and bonded to the upper side of the sealed bottom cover near the bottom end.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] 1. In the utility model, a staggered plug-in labyrinth seal structure formed by four groups of annular convex strips on the upper side of the top block pushed by a spring and four groups of annular grooves on the top of the inner top of the top cover cylinder cooperates with a rubber sealing sleeve bonded to the inner side of the annular groove of the top block to achieve a rotational seal of the threaded rod at the through hole of the top cover. The labyrinth seal structure is used to produce a throttling effect to prevent external water from leaking into the top cover and protect the threaded structure of the threaded rod.

[0013] 2. In the utility model, a sealing bonding structure of a corrugated pipe made of silicone material is used between the top cover and the sealing bottom cover, so that the thread surface of the threaded rod is always wrapped inside the pipe during movement, abandoning the thread exposure structure of the screw component in the traditional screw valve, separating the threaded rod from the external water body, avoiding the corrosion of the threaded rod by oxidizing substances in the water body, and ensuring the normal shutdown and use of the screw valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a front view structural schematic diagram of the utility model.

[0016] Figure 3 It is a left-side structural schematic diagram of the utility model.

[0017] Figure 4 It is a schematic diagram of the cutaway structure of the utility model.

[0018] Figure 5 The utility model Figure 4 Schematic diagram of the enlarged structure of part A in the middle.

[0019] Figure 6 It is a rear view cross-sectional structural schematic diagram of the utility model.

[0020] Figure 7 The utility model Figure 6 Schematic diagram of the enlarged structure of part B in the middle.

[0021] Figure numerals: 1. hand wheel; 2. top cover; 3. support sleeve; 4. sealing bottom cover; 5. fixing bolt; 6. fixing nut; 7. valve body; 8. threaded rod; 9. valve cover; 10. oil sealing bolt; 11. plunger; 12. valve stem; 13. top block; 14. connecting pipe; 15. spring; 16. rubber sealing sleeve; 17. sealing ring. DETAILED DESCRIPTION

[0022] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0023] like Figure 1-Figure 7 As shown, the utility model provides a sealing and rust-proof structure of a valve screw, comprising a handwheel 1; a threaded rod 8 is installed at the bottom end of the handwheel 1, the bottom end of the threaded rod 8 is rotatably connected to a valve stem 12, and a plunger 11 is bonded to the bottom end of the valve stem 12; it also comprises a spring 15, a rubber sealing sleeve 16 and a sealing ring 17; a valve body 7 is bonded to the outer side of the sealing ring 17; the top end of the valve body 7 is connected to a valve cover 9 through a fixing bolt 5 and a fixing nut 6, the top end of the valve cover 9 is screwed with a sealing bottom cover 4, the upper side of the sealing bottom cover 4 is welded with a supporting sleeve 3, the inner side of the supporting sleeve 3 is slidably connected with a top cover 2, and the bottom end of the top cover 2 is bonded with a connecting pipe 14; a small threaded through hole is provided on the upper side of the valve cover 9, and an oil sealing bolt 10 is screwed into the small threaded through hole of the valve cover 9; the bottom end of the connecting pipe 14 is bonded with the sealing bottom cover 4; the bottom end of the spring 15 is welded with the threaded rod 8, the top end of the spring 15 is welded with a top block 13, and the top block 13 is bonded to the rubber sealing sleeve 16.

[0024] When the utility model is performing valve opening and closing control work in a sealed and waterproof state, the operator holds the hand wheel 1 to rotate, and the hand wheel 1 drives the threaded rod 8 to rotate. Since the threaded surface on the outer side of the threaded rod 8 is meshed and connected in the threaded through hole of the valve cover 9, the threaded rod 8 can drive the valve stem 12 connected to the bottom end of the threaded rod 8 to move synchronously up and down with the threaded rod 8 during the rotation process. The valve stem 12 pushes and pulls the plunger 11 bonded at the bottom end to perform lifting and lowering movements. When the plunger 11 contacts the water flow hole of the valve body 7 downward, the valve is closed. When the plunger 11 is separated from the valve body 7 upward, water flows out. When the valve is turned on, the threaded rod 8 moves up and down in a rotating manner. The lower ring plate supporting spring 15 of the threaded rod 8 rotates and moves synchronously with the threaded rod 8, and the spring 15 pushes the four groups of annular convex strips on the upper side of the top block 13 to be staggered and embedded in the four groups of annular grooves on the outer side of the bottom of the through hole of the top cover 2. At this time, the four groups of annular convex strips rotate along the four groups of annular grooves of the top cover 2, and the top block 13 pushes the four groups of annular grooves on the upper side of the top cover 2 to be staggered and embedded in the four groups of annular convex strips on the lower side of the upper ring plate of the threaded rod 8. The rubber gasket fits tightly on the upper side of the top cover 2, so that the top cover 2 forms a labyrinth sealing structure between the top block 13 and the upper ring plate of the threaded rod 8. The labyrinth staggered sealing structure is used to make the top block 13 and the upper ring plate of the threaded rod 8 push the contact surface of the top cover 2 to produce a throttling effect, thereby preventing external water from leaking into the top cover 2 from the through hole of the top cover 2. When the threaded rod 8 moves up and down in a rotating manner, the corrugated silicone material of the connecting pipe 14 allows the connecting pipe 14 to be arbitrarily deformed, stretched or compressed, so that the connecting pipe 14 is on the threaded rod 8. When moving downward, the threaded structure exposed on the outer side of the valve cover 9 is always covered and protected to prevent the threaded structure of the threaded rod 8 from contacting with the water body and avoiding water erosion. In the process of the threaded rod 8 moving up and down in a rotating manner, the threaded structure on the outer side of the threaded rod 8 will pass through the anti-rust oil stored in the cavity of the valve cover 9. The threaded structure of the threaded rod 8 will be immersed in the anti-rust oil during the movement. The threaded surface of the threaded rod 8 is contaminated with the anti-rust oil, which can not only prevent rust on the surface of the threaded rod 8, but also lubricate the threaded structure, so that the opening and closing control of the valve threaded rod 8 can operate effectively.

[0025] In the disclosed embodiment, the top block 13 is a disc-shaped structure, and the upper side surface of the disc-shaped structure of the top block 13 is provided with four groups of annular convex strips, and the annular convex strips are arranged equidistantly inside and outside. A through hole is provided at the center position of the disc of the top block 13, and the threaded rod 8 is inserted into the through hole of the top block 13 without a threaded surface on the outer side. An annular groove is provided on the hole wall on the inner side of the through hole of the top block 13, and a rubber sealing sleeve 16 is bonded to the inner side of the annular groove. The rubber sealing sleeve 16 is nested in the non-threaded surface of the outer side of the threaded rod 8, and the axial sealing of the surface of the threaded rod 8 is completed by the rubber sealing sleeve 16.

[0026] In the disclosed embodiment, the top cover 2 is a cylindrical structure with an opening at the bottom, and two groups of convex strips are provided on the outer side surface of the top cover 2, and a through hole which passes through from top to bottom is provided at the center position of the upper side surface of the top cover 2. The outer side surface of the threaded rod 8 has a non-threaded surface and is inserted into the through hole of the top cover 2. The outer side of the top end of the through hole of the top cover 2 and the outer side of the bottom end of the through hole are both provided with four groups of annular grooves arranged equidistantly from the inside to the outside, and the four groups of annular convex strip structures of the top block 13 are embedded in the four groups of annular grooves on the outer side of the bottom end of the through hole of the top cover 2, so that the contact surface of the top block 13 and the top cover 2 forms a labyrinth seal, producing a throttling effect, thereby increasing the fluid leakage resistance, thereby reducing the flow velocity and kinetic energy, and preventing water from leaking from the contact surface between the top block 13 and the top cover 2.

[0027] In the embodiment of the present disclosure, two groups of ring plates are provided on the outer side of the threaded rod 8 in sequence from top to bottom, and a spring 15 is welded to the upper side of the lower ring plate of the threaded rod 8. During the rotation of the threaded rod 8, the threaded rod 8 pushes the top block 13 and the top cover 2 to always fit tightly through the lower ring plate supporting spring 15. The lower side of the upper ring plate of the threaded rod 8 is provided with four groups of annular convex strips arranged equidistantly from the inside to the outside. The four groups of annular convex strips at the upper ring plate of the threaded rod 8 are embedded in four groups of annular grooves on the outer side of the top of the through hole of the top cover 2, so that the contact surface between the upper side ring plate of the threaded rod 8 and the top cover 2 forms a labyrinth seal, producing a throttling effect, and cooperating with the rubber gasket bonded to the bottom of the upper ring plate of the threaded rod 8 to prevent liquid leakage from the contact position between the upper ring plate of the threaded rod 8 and the upper side of the top cover 2.

[0028] In the disclosed embodiment, a cylindrical cavity structure is provided inside the valve cover 9, and a large threaded through hole is provided at the top center position of the cylindrical cavity of the valve cover 9, and the threaded surface of the outer side of the threaded rod 8 is meshedly connected in the large threaded through hole of the valve cover 9. A through hole is provided at the bottom center position of the cylindrical cavity of the valve cover 9, and the valve stem 12 is inserted into the through hole of the valve cover 9, so that when the threaded rod 8 rotates, it pushes the valve stem 12 connected to the bottom rotation to move up and down, thereby completing the plunger 11 to control the water flow of the valve body 7. Anti-rust oil is installed inside the cylindrical cavity structure of the valve cover 9, and the threaded surface of the threaded rod 8 is immersed in the anti-rust oil inside the cylindrical cavity structure of the valve cover 9 during the movement of the thread, so that the surface of the threaded structure of the threaded rod 8 is covered with the anti-rust oil to perform anti-rust lubrication of the metal structure.

[0029] In the disclosed embodiment, two groups of left-right symmetrically distributed grooves are provided on the inner side of the support sleeve 3, and the convex strips on the outer side of the top cover 2 are embedded in the grooves of the support sleeve 3, so that the top cover 2 can move in a directional manner along the grooves of the support sleeve 3.

[0030] In the disclosed embodiment, the connecting pipe 14 is a corrugated hose made of silicone material. The outer side surface of the connecting pipe 14 is sealed and bonded to the inner side surface of the cylindrical structure of the top cover 2 near the top end, and the outer side surface of the connecting pipe 14 is sealed and bonded to the upper side surface of the sealed bottom cover 4 near the bottom end, so that the connecting pipe 14 always covers the outer side of the threaded structure of the threaded rod 8 during the up and down movement of the threaded rod 8, thereby sealing and protecting the threaded structure of the threaded rod 8.

[0031] The installation, connection or setting methods of all the above components are common mechanical methods, such as welding, threaded connection, screw connection, etc., and the specific structures, models and coefficient indicators of all its components are its own technology, and can be implemented as long as it can achieve its beneficial effects. The hand wheel 1, valve body 7, rubber sealing sleeve 16, and sealing ring 17 used above are all common components on the market. When you buy them back and use them, you only need to connect them according to the instruction manual purchased together, so I will not repeat them here.

[0032] The technical solution of the present invention is not limited to the scope of the embodiments of the present invention, and the technical contents not described in detail in the present invention are all well-known technologies.

Claims

1. A sealing and rust-proof structure for a valve screw, comprising a hand wheel (1); a threaded rod (8) is installed at the bottom end of the hand wheel (1); a valve stem (12) is rotatably connected to the bottom end of the threaded rod (8); a plunger (11) is bonded to the bottom end of the valve stem (12); the characteristics are: It also includes a spring (15), a rubber sealing sleeve (16) and a sealing ring (17); the outer side of the sealing ring (17) is bonded to the valve body (7); the top end of the valve body (7) is connected to the valve cover (9) through a fixing bolt (5) and a fixing nut (6); the top end of the valve cover (9) is screwed to the sealing bottom cover (4); the upper side of the sealing bottom cover (4) is welded to the support sleeve (3); the inner side of the support sleeve (3) is slidably connected to the top cover (2); the bottom end of the top cover (2) is bonded to the connecting pipe (14); the upper side of the valve cover (9) is provided with a small threaded through hole, and the small threaded through hole of the valve cover (9) is screwed to the oil sealing bolt (10); the bottom end of the connecting pipe (14) is bonded to the sealing bottom cover (4); the bottom end of the spring (15) is welded to the threaded rod (8), the top end of the spring (15) is welded to the top block (13), and the top block (13) is bonded to the rubber sealing sleeve (16).

2. A sealing and rust-proof structure for a valve screw as claimed in claim 1, characterized in that: The top block (13) is a disc-shaped structure. The upper side surface of the disc-shaped structure of the top block (13) is provided with four groups of annular convex strips, and the annular convex strips are arranged equidistantly inside and outside. A through hole is provided at the center of the top block (13) disc, and the non-threaded surface of the outer side surface of the threaded rod (8) is inserted into the through hole of the top block (13). An annular groove is provided on the hole wall on the inner side of the through hole of the top block (13). A rubber sealing sleeve (16) is bonded to the inner side surface of the annular groove, and the rubber sealing sleeve (16) is embedded in the non-threaded surface of the outer side surface of the threaded rod (8).

3. A sealing and rust-proof structure for a valve screw as claimed in claim 1, characterized in that: The top cover (2) is a cylindrical structure with an opening at the bottom, the outer side surface of the top cover (2) is provided with two groups of convex strips, the center position of the upper side surface of the top cover (2) is provided with a through hole that passes through from top to bottom, the outer side surface of the threaded rod (8) has a non-threaded surface and is inserted into the through hole of the top cover (2), the outer side of the top end of the through hole of the top cover (2) and the outer side of the bottom end of the through hole are both provided with four groups of annular grooves arranged equidistantly from the inside to the outside, and the four groups of annular convex strip structures of the top block (13) are embedded in the four groups of annular grooves on the outer side of the bottom end of the through hole of the top cover (2).

4. A sealing and rust-proof structure for a valve screw as claimed in claim 1, characterized in that: The outer side surface of the threaded rod (8) is provided with two groups of ring plates in sequence from top to bottom, the upper side surface of the lower ring plate of the threaded rod (8) is welded with a spring (15), and the lower side surface of the upper ring plate of the threaded rod (8) is provided with four groups of annular convex strips arranged equidistantly from inside to outside, and the four groups of annular convex strips at the upper ring plate of the threaded rod (8) are embedded in four groups of annular grooves on the outer side of the top end of the through hole of the top cover (2).

5. The sealing and rust-proof structure of a valve screw as claimed in claim 1, characterized in that: The valve cover (9) has a cylindrical cavity structure inside, a large threaded through hole extending vertically is provided at the top center of the cylindrical cavity of the valve cover (9), the threaded surface of the outer side of the threaded rod (8) is meshedly connected in the large threaded through hole of the valve cover (9), a through hole extending vertically is provided at the bottom center of the cylindrical cavity of the valve cover (9), the valve stem (12) is inserted into the through hole of the valve cover (9), and anti-rust oil is filled inside the cylindrical cavity structure of the valve cover (9).

6. A sealing and rust-proof structure for a valve screw as claimed in claim 1, characterized in that: The inner side surface of the support sleeve (3) is provided with two groups of grooves which are symmetrically distributed on the left and right sides, and the outer side surface of the top cover (2) is provided with convex strips which are embedded in the grooves of the support sleeve (3).

7. The sealing and rust-proof structure of a valve screw as claimed in claim 1, characterized in that: The connecting pipe (14) is a corrugated hose made of silicone material. The outer side surface of the connecting pipe (14) is sealed and bonded to the inner side surface of the cylinder structure of the top cover (2) near the top end, and the outer side surface of the connecting pipe (14) is sealed and bonded to the upper side surface of the sealed bottom cover (4) near the bottom end.

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