A cemented carbide high-speed wear-resistant precision valve stem protective sleeve

Abstract

The present invention relates to a cemented carbide high-speed wear-resistant precision valve stem protective sleeve applied to the technical field of protective sleeves, which includes a valve stem, a soft sleeve, a protective sleeve, a guide rail beam, a wear-resistant ball head, an oil sump and a seepage slot. Through the combination of the soft sleeve and the protective sleeve, when the valve stem rises, the valve stem passes through the soft sleeve and pushes the guide rail beam, enabling the protective sleeve to return to a vertical state. Moreover, the top of the valve stem slides on the inner surface of the guide rail beam through the wear-resistant ball head, and the butter used for lubrication on the valve stem adheres to the inside of the protective sleeve, and then the butter flows towards the protective sleeve through the seepage slot, thereby effectively improving the sliding effect between the wear-resistant ball head and the guide rail beam. By observing the vertical and lying states of the protective sleeve, the opening and closing conditions of the valve stem can be intuitively understood. And when the protective sleeve is not in use, it is in a lying state, effectively reducing the occupied space of the protective sleeve and at the same time effectively improving the anti-collision ability of the protective sleeve.

Description

Technical Field

[0001] A valve stem protective sleeve involved in the present invention, in particular, a cemented carbide high-speed wear-resistant precision valve stem protective sleeve applied to the technical field of protective sleeves. Background Art

[0002] Open-stem gate valves are widely used in pipeline systems, often used in outdoor or factory environments. The valve stem of an open-stem gate valve extends a long way outside the valve body. However, due to the use requirements such as gas supply and water supply, the exposed valve stem is prone to rust, which brings inconvenience to the operation of the valve. After the valve stem thread rusts, the operation difficulty of the valve increases significantly.

[0003] The specification of Chinese Patent CN202221081125.8 discloses "Valve Stem Protective Sleeve Equipped with an Indicator Ring and a Valve Equipped with Such a Protective Sleeve". This valve can know the height position of the valve stem and thus the opening degree of the valve from a distance and in all directions by observing the indicator ring. There is an indicator ring on the outside of the sleeve body of this protective sleeve, and the indicator ring can rise and fall synchronously with the rise and fall of the valve stem. The magnetic adsorption method sleeve body uses non-magnetic materials such as plastic and aluminum, a magnet is fixedly placed at the top of the valve stem inside the sleeve, and the indicator ring outside the sleeve is made of magnetic materials such as steel. The magnet attracts the indicator ring to rise and fall. The specification of Chinese Patent CN202120581265.0 discloses "Valve Stem Protective Sleeve". A protective tube, which is hollow inside and has an opening at one end and a closed structure at the other end; the protective tube is partially or entirely made of transparent material; a short tube, arranged at the end of the protective tube with the opening, and an observation window is arranged on the circumferential side wall of the short tube, and the inside of the short tube can be observed through the observation window; a locking nut, arranged at the other end where the short tube is connected to the protective tube. The protective tube is made of transparent material, and the opening degree of the valve can be observed to judge the current state of the valve.

[0004] Most current protective sleeves are installed on the top of the handwheel of the valve. The protective sleeve is vertically installed on the axis of the handwheel. The vertically installed protective sleeve increases the overall height of the valve, and the protective sleeve itself is easily knocked by the outside world, affecting the use of the protective sleeve. And in order to observe the state of the valve stem in the protective sleeve, the outside of the protective sleeve needs a structure that can indicate the state of the valve stem. The addition of the indicating structure makes the protective sleeve more complex and further affects the use of the protective sleeve. Summary of the Invention

[0005] Aiming at the above-mentioned prior art, the technical problem to be solved by the present invention is that the protective sleeve vertically installed on the axis of the handwheel is easily knocked by the outside world, and the outside of the protective sleeve needs a structure that can indicate the state of the valve stem, resulting in the complexity of the protective sleeve and affecting the use of the protective sleeve.

[0006] To solve the above problems, the present invention provides a hard alloy high-speed wear-resistant precision valve stem protective sleeve, which includes a valve stem and a handwheel threadedly connected to the valve stem. A fixed sleeve seat is fixedly connected to the middle of the handwheel, a soft sleeve is fixedly connected to the middle of the fixed sleeve seat, a protective sleeve is fixedly connected to the top of the soft sleeve, both the soft sleeve and the protective sleeve are sleeved on the valve stem, a guide rail beam is fixedly connected to the outside of the protective sleeve, a turning bracket is fixedly connected to one end of the fixed sleeve seat, the bottom end of the guide rail beam extends out of the bottom end of the protective sleeve, and the bottom end of the guide rail beam is hinged to the turning bracket;

[0007] A wear-resistant ball head is fixedly connected to the top end of the valve stem. The ball head of the wear-resistant ball head deviates from the axis of the valve stem, and the wear-resistant ball head is slidably connected to the inner surface of the guide rail beam. An oil storage groove is fixedly connected to the end of the inner wall of the protective sleeve away from the guide rail beam. A seepage slot is provided between the oil storage groove and the guide rail beam, and the seepage slot is arranged obliquely downward.

[0008] In the above-mentioned hard alloy high-speed wear-resistant precision valve stem protective sleeve, through the combination of the soft sleeve and the protective sleeve, the opening and closing conditions of the valve stem can be intuitively understood by observing the state of the protective sleeve, effectively avoiding accidents caused by misoperation of the valve, and when the protective sleeve is not in use, it is in a lying state, effectively reducing the occupied space of the protective sleeve, and at the same time effectively improving the anti-collision ability of the protective sleeve.

[0009] As a further improvement of the present application, a tension spring is fixedly connected between the end of the fixed sleeve seat away from the turning bracket and the outside of the protective sleeve. The soft sleeve is made of wear-resistant rubber material. The elastic force of the tension spring is used to pull the protective sleeve to turn, so that the protective sleeve can automatically lie flat when not in use.

[0010] As a further improvement of the present application, an extension sleeve is sleeved on the top of the protective sleeve, and the top end of the extension sleeve is in contact with the top end of the valve stem. By adding the extension sleeve, the length of the protective sleeve is effectively shortened.

[0011] As a further improvement of the present application, a sealing cover is fixedly connected to the top end of the extension sleeve, and a ball pocket clip is fixedly connected to the inside of the sealing cover. The ball pocket clip clamps the wear-resistant ball head correspondingly, and the ball pocket clip is made of spring steel material. By clamping the wear-resistant ball head with the ball pocket clip, it is convenient for the extension sleeve to automatically contract following the valve stem.

[0012] As another improvement of the present application, the length of the extension sleeve corresponds to the length of the protective sleeve, and the extension sleeve is sleeved inside the protective sleeve. The lower opening of the extension sleeve is in contact with the wear-resistant ball head correspondingly. The wear-resistant ball head can push the lower opening of the extension sleeve to realize that the extension sleeve extends out of the protective sleeve first. Through the standardized setting of the lengths of the extension sleeve and the protective sleeve, different use states of the protective sleeve are effectively divided, which is convenient for the operator to intuitively understand the working state of the valve.

[0013] As another supplementary improvement of the present application, both outer ends of the guide rail beam are fixedly connected with limit tubes, the outer edge of the closed cover is fixedly connected with limit bolts, the limit bolts are inserted into the limit tubes, and a limit nut is threadedly connected to the bottom of the limit bolts. By the movement of the limit bolts in the limit tubes, the telescopic range of the extension sleeve is effectively limited.

[0014] As another supplementary improvement of the present application, a marking wire is fixedly connected to the end of the wear-resistant ball head away from the ball head, and the top end of the marking wire penetrates through the closed cover. By observing the telescopic state of the marking wire, the telescopic state of the valve stem in the extension sleeve can be effectively judged.

[0015] As yet another improvement of the present application, a limit head is fixedly connected to the top end of the marking wire, and the limit head corresponds to the outer surface of the closed cover. The marking wire is made of stainless steel wire. When the valve stem disengages from the extension sleeve, the marking wire completely retracts into the extension sleeve, and the ability of the extension sleeve to accidentally extend out of the protective sleeve is limited by tightening the limit head.

[0016] In summary, through the combination of the soft sleeve and the protective sleeve, the present invention realizes that when the valve stem rises, the valve stem passes through the soft sleeve and pushes the guide rail beam, enabling the protective sleeve to return to the vertical state. And the top end of the valve stem slides on the inner surface of the guide rail beam through the wear-resistant ball head. The butter used for lubrication on the valve stem adheres to the inside of the protective sleeve, and then the butter flows towards the protective sleeve through the seepage slots, thereby effectively improving the sliding effect between the wear-resistant ball head and the guide rail beam. On the contrary, when the valve stem descends, the protective sleeve fails to be supported by the valve stem, and the protective sleeve turns over to the lying state. By observing the state of the protective sleeve, the opening and closing conditions of the valve stem can be intuitively understood, effectively avoiding accidents caused by misoperation of the valve. And when the protective sleeve is not in use, it is in the lying state, effectively reducing the occupied space of the protective sleeve and at the same time effectively improving the anti-collision ability of the protective sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Is the three-dimensional structure diagram of the first embodiment of the present application;

[0018] Figure 2 Is the three-dimensional demonstration diagram of the vertical restoration state of the protective sleeve in the first embodiment of the present application;

[0019] Figure 3 Is the sectional three-dimensional structure diagram of the first embodiment of the present application;

[0020] Figure 4 Is the sectional three-dimensional view of the oil accumulation groove and the seepage slot in the first embodiment of the present application;

[0021] Figure 5 Is the three-dimensional demonstration diagram of the extension sleeve pushing out the protective sleeve in the second embodiment of the present application;

[0022] Figure 6 This is a three-dimensional demonstration diagram showing the state of the marking wire extending out of the extension sleeve in the second embodiment of the present application;

[0023] Figure 7 This is a three-dimensional demonstration diagram showing the marking wire extending out and the extension sleeve contracting into the protective sleeve in the second embodiment of the present application;

[0024] Figure 8 This is the three-dimensional structure of the protective sleeve in the second embodiment of the present application;

[0025] Figure 9 This is a sectional three-dimensional demonstration diagram showing the state of the wear-resistant ball head abutting against the lower opening of the extension sleeve in the second embodiment of the present application;

[0026] Figure 10 This is a three-dimensional demonstration diagram showing the state of the wear-resistant ball head extending to the top of the extension sleeve in the second embodiment of the present application;

[0027] Figure 11 This is a three-dimensional demonstration diagram showing the state change of the ball pocket clip and the wear-resistant ball head in the second embodiment of the present application.

[0028] Description of the reference numerals in the figure:

[0029] 1. Valve stem; 101. Handwheel; 2. Fixed sleeve seat; 201. Flexible sleeve; 202. Protective sleeve; 203. Guide rail beam; 204. Flipping bracket; 205. Wear-resistant ball head; 206. Oil sump; 207. Seepage slot; 208. Tensile spring; 3. Extension sleeve; 301. Sealing cover; 302. Ball pocket clip; 303. Limit tube; 304. Limit bolt; 305. Marking wire; 306. Limit head. Specific embodiments

[0030] The following provides a detailed description of the two embodiments of the present application with reference to the accompanying drawings.

[0031] The first embodiment:

[0032] Figures 1 to 3Shown is a cemented carbide high-speed wear-resistant precision valve stem protective sleeve, including a valve stem 1 and a handwheel 101 threadedly connected to the valve stem 1. A fixed sleeve seat 2 is fixedly connected to the middle of the handwheel 101. A soft sleeve 201 is fixedly connected to the middle of the fixed sleeve seat 2. The top of the soft sleeve 201 is fixedly connected to a protective sleeve 202. Both the soft sleeve 201 and the protective sleeve 202 are sleeved on the valve stem 1. A guide rail beam 203 is fixedly connected to the outside of the protective sleeve 202. A turning bracket 204 is fixedly connected to one end of the fixed sleeve seat 2. The bottom end of the guide rail beam 203 extends out of the bottom end of the protective sleeve 202, and the bottom end of the guide rail beam 203 is hinged to the turning bracket 204. A tension spring 208 is fixedly connected between the end of the fixed sleeve seat 2 far from the turning bracket 204 and the outside of the protective sleeve 202. The soft sleeve 201 is made of wear-resistant rubber material. The elastic force of the tension spring 208 is used to pull the protective sleeve 202 to turn over, so that the protective sleeve 202 can automatically lie flat when not in use;

[0033] When rotating the handwheel 101 to open the valve, the valve stem 1 moves upward. The valve stem 1 rises through the soft sleeve 201 and enters the protective sleeve 202. The top end of the valve stem 1 abuts against the guide rail beam 203, realizing that the guide rail beam 203 drives the protective sleeve 202 to return to the vertical state. Subsequently, the valve stem 1 continues to extend into the protective sleeve 202. On the contrary, when rotating the handwheel 101 to close the valve, the valve stem 1 leaves the protective sleeve 202. The elastic force of the tension spring 208 is used to pull the protective sleeve 202 to turn over and lie flat. By observing the state of the protective sleeve 202, the opening and closing conditions of the valve stem 1 can be intuitively understood, effectively avoiding accidents caused by misoperation of the valve.

[0034] Figures 3 to 4 Shown is that a wear-resistant ball head 205 is fixedly connected to the top end of the valve stem 1. The ball head of the wear-resistant ball head 205 deviates from the axis of the valve stem 1, and the wear-resistant ball head 205 is slidably connected to the inner surface of the guide rail beam 203, realizing that the wear-resistant ball head 205 is more biased towards the guide rail beam 203 when it is in the protective sleeve 202, so as to realize the sliding connection between the wear-resistant ball head 205 and the guide rail beam 203. An oil storage groove 206 is fixedly connected to the end of the inner wall of the protective sleeve 202 far from the guide rail beam 203. A seepage seam 207 is provided between the oil storage groove 206 and the guide rail beam 203. The seepage seam 207 is arranged obliquely downward;

[0035] During the use of the valve stem 1, butter for lubrication is applied to its outer surface. During the process of the valve stem 1 repeatedly entering and exiting the protective sleeve 202, the inner wall of the protective sleeve 202 will adhere to this butter. When the protective sleeve 202 is in a lying state, the butter will drop and concentrate in the oil sump 206. When the protective sleeve 202 returns to the vertical state, the butter originally in the oil sump 206 will flow towards the guide rail beam 203 through the inclined downward seepage slot 207, thereby providing lubrication for the sliding of the wear-resistant ball head 205 on the guide rail beam 203, effectively improving the sliding effect between the wear-resistant ball head 205 and the guide rail beam 203, and effectively reducing the wear of the wear-resistant ball head 205 and the guide rail beam 203.

[0036] The second implementation method:

[0037] Compared with the first implementation method, an extension sleeve 3 is mainly added. The specific added structure is as follows, and the rest of the structure is the same as that of the first implementation method.

[0038] Figure 5 and Figure 11 As shown, an extension sleeve 3 is sleeved on the top of the protective sleeve 202. The top end of the extension sleeve 3 is in contact with the top end of the valve stem 1. By adding the extension sleeve 3, the length of the protective sleeve 202 is effectively shortened. A sealing cover 301 is fixedly connected to the top end of the extension sleeve 3, and a ball pocket clip 302 is fixedly connected inside the sealing cover 301. The ball pocket clip 302 clamps the wear-resistant ball head 205 correspondingly, and the ball pocket clip 302 is made of spring steel material. By clamping the wear-resistant ball head 205 with the ball pocket clip 302, it is convenient for the extension sleeve 3 to automatically follow the contraction of the valve stem 1;

[0039] The telescopic deformation ability of the protective sleeve 202 is realized through the extension sleeve 3, which is convenient for shortening the overall length of the protective sleeve 202 in the contracted state. When the top end of the valve stem 1 extends to the sealing cover 301, the wear-resistant ball head 205 is clamped by the ball pocket clip 302, realizing the combination of the top end of the valve stem 1 and the sealing cover 301, which is convenient for the subsequent descent of the valve stem 1 to pull the extension sleeve 3 to automatically retract the extension sleeve 3.

[0040] Figures 5 to 10It is shown that the length of the extension sleeve 3 corresponds to the length of the protective sleeve 202, and the extension sleeve 3 is sleeved inside the protective sleeve 202. The lower opening of the extension sleeve 3 corresponds to the contact with the wear-resistant ball head 205. The wear-resistant ball head 205 can push the lower opening of the extension sleeve 3 to enable the extension sleeve 3 to extend out of the protective sleeve 202 one step ahead. Through the standardized setting of the lengths of the extension sleeve 3 and the protective sleeve 202, different usage states of the protective sleeve are effectively divided, facilitating the operator to intuitively understand the working state of the valve. At both outer ends of the guide rail beam 203, limiting tubes 303 are fixedly connected. At the outer edge of the closing cover 301, a limiting bolt 304 is fixedly connected. The limiting bolt 304 is inserted into the limiting tube 303, and a limiting nut is threadedly connected to the bottom of the limiting bolt 304. Through the movement of the limiting bolt 304 in the limiting tube 303, the telescopic range of the extension sleeve 3 is effectively limited;

[0041] By providing the extension sleeve 3 and the protective sleeve 202 with corresponding lengths, different usage states of the protective sleeve are realized, which represent the fully open state, closed state, and semi-open and semi-closed state of the valve. When the valve is opened and the valve stem 1 is rotated upward, the wear-resistant ball head 205 at the top of the valve stem 1 slides upward along the guide rail beam 203. At this time, the wear-resistant ball head 205 abuts against the lower opening of the extension sleeve 3 and pushes the extension sleeve 3 to extend out of the protective sleeve 202 one step ahead, that is, it reaches the situation where the extension sleeve 3 has extended out of the protective sleeve 202, but the valve stem 1 is still inside the protective sleeve 202. In this state, it represents that the valve stem 1 is in the process of opening the valve to the semi-open state of the valve.

[0042] Figures 6 to 11 It is shown that a marking wire 305 is fixedly connected to the end of the wear-resistant ball head 205 away from the ball head. The top of the marking wire 305 penetrates and extends out of the closing cover 301. By observing the telescopic state of the marking wire 305, the telescopic state of the valve stem 1 inside the extension sleeve 3 can be effectively judged. A limiting head 306 is fixedly connected to the top of the marking wire 305, and the limiting head 306 corresponds to the outer surface of the closing cover 301. The marking wire 305 is made of stainless steel wire material. When the valve stem 1 is separated from the extension sleeve 3, the marking wire 305 completely retracts into the extension sleeve 3, and the extension sleeve 3 is prevented from accidentally extending out of the protective sleeve 202 by tightening the limiting head 306;

[0043] By fixedly connecting a marking wire 305 to the wear-resistant ball head 205, the telescopic state of the marking wire 305 is used to judge the telescopic state of the valve stem 1 in the extension sleeve 3. Specifically, when the valve changes from the semi-open state to the fully open state, that is, when the valve stem 1 has completely extended into the protective sleeve 202, and when the valve stem 1 is to extend into the extension sleeve 3 subsequently, the more the valve stem 1 extends into the extension sleeve 3, the more the marking wire 305 extends out of the extension sleeve 3, so as to facilitate the staff to judge that the valve stem 1 is in the state from the semi-open state to the fully open state of the valve. The telescopic state of the marking wire 305 can also assist in judging that when the valve changes from the open state to the semi-closed state, that is, when the valve stem 1 completely extends into the protective sleeve 202 and the extension sleeve 3, and when the valve stem 1 is to retract into the protective sleeve 202 subsequently, since the wear-resistant ball head 205 at the top of the valve stem 1 is clamped by the ball pocket clip 302, the extension sleeve 3 will be first pulled back into the protective sleeve 202 during the retraction process of the valve stem 1. Therefore, when the extension sleeve 3 has completely retracted into the protective sleeve 202, but the marking wire 305 still extends out of the extension sleeve 3, it means that the valve stem 1 is in the semi-closed state at this time.

[0044] Combined with the current actual requirements, the above-mentioned implementation manner adopted in this application, the protection scope is not limited to this. Within the scope of knowledge possessed by those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A hard alloy high-speed wear-resistant precision valve stem protective sleeve, characterized in that: It includes a valve stem (1) and a handwheel (101) threadedly connected to the valve stem (1). A fixed sleeve base (2) is fixedly connected to the middle of the handwheel (101). A soft sleeve (201) is fixedly connected to the middle of the fixed sleeve base (2). The top of the soft sleeve (201) is fixedly connected to a protective sleeve (202). Both the soft sleeve (201) and the protective sleeve (202) are sleeved on the valve stem (1). A guide rail beam (203) is fixedly connected to the outside of the protective sleeve (202). One end of the fixed sleeve base (2) is fixedly connected to a flipping bracket (204). The bottom end of the guide rail beam (203) extends out of the bottom end of the protective sleeve (202), and the bottom end of the guide rail beam (203) is hinged to the flipping bracket (204). A tension spring (208) is fixedly connected between the end of the fixed sleeve base (2) far from the flipping bracket (204) and the outside of the protective sleeve (202). The soft sleeve (201) is made of wear-resistant rubber material, which facilitates the automatic lying flat of the protective sleeve (202) when not in use; A wear-resistant ball head (205) is fixedly connected to the top end of the valve stem (1). The ball head of the wear-resistant ball head (205) deviates from the axis of the valve stem (1), and the wear-resistant ball head (205) is slidably connected to the inner surface of the guide rail beam (203). An oil accumulation groove (206) is fixedly connected to one end of the inner wall of the protective sleeve (202) far from the guide rail beam (203). A seepage gap (207) is formed between the oil accumulation groove (206) and the guide rail beam (203). The seepage gap (207) is arranged obliquely downward.

2. The hard alloy high-speed wear-resistant precision valve stem protective sleeve according to claim 1, characterized in that: An extension sleeve (3) is sleeved on the top of the protective sleeve (202). The top end of the extension sleeve (3) corresponds to the top end of the valve stem (1) in contact.

3. A hard alloy high-speed wear-resistant precision valve stem protective sleeve according to claim 2, characterized in that: A closed cover (301) is fixedly connected to the top end of the extension sleeve (3). A ball pocket clip (302) is fixedly connected to the inside of the closed cover (301). The ball pocket clip (302) clamps the wear-resistant ball head (205) correspondingly, and the ball pocket clip (302) is made of spring steel material.

4. A hard alloy high-speed wear-resistant precision valve stem protective sleeve according to claim 2, characterized in that: The length of the extension sleeve (3) corresponds to the length of the protective sleeve (202), and the extension sleeve (3) is sleeved inside the protective sleeve (202). The lower opening of the extension sleeve (3) corresponds to the contact with the wear-resistant ball head (205).

5. A hard alloy high-speed wear-resistant precision valve stem protective sleeve according to claim 3, characterized in that: Limit tubes (303) are fixedly connected to both outer ends of the guide rail beam (203). Limit bolts (304) are fixedly connected to the outer edge of the closed cover (301). The limit bolts (304) are inserted into the limit tubes (303), and a limit nut is threadedly connected to the bottom of the limit bolts (304).

6. A hard alloy high-speed wear-resistant precision valve stem protective sleeve according to claim 3, characterized in that: A marking wire (305) is fixedly connected to the end of the wear-resistant ball head (205) far from the ball head. The top end of the marking wire (305) penetrates and extends out of the closed cover (301).

7. A cemented carbide high-speed wear-resistant precision valve stem protective sleeve according to claim 6, characterized in that: A limit head (306) is fixedly connected to the top end of the marking wire (305). The limit head (306) corresponds to the outer surface of the closed cover (301). The marking wire (305) is made of stainless steel wire material.

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