Valve rod protection device

Abstract

The utility model discloses a valve rod protection device which comprises a sleeve connected to a valve body in a threaded mode, two vertical rods of an n-shaped sliding rod are fixedly connected with one side of the top face of the sleeve, a transverse rod of the n-shaped sliding rod is sleeved with a square through groove in an attached and sliding mode, the square through groove is formed in the side wall of a cover plate, and a plurality of guide rods are symmetrically arranged in the transverse rod of the n-shaped sliding rod in a penetrating and sliding mode. The distance between two vertical rods of the n-shaped sliding rod is equal to the width of the cover plate, the cross section of a transverse rod and the cross section of the vertical rod of the n-shaped sliding rod are both square, the bottom face of the cover plate is symmetrically and fixedly connected with two dovetail blocks, the dovetail blocks are arranged in dovetail grooves in an attached and sliding mode, and the dovetail grooves are formed in the top face of the sleeve. The dovetail block is arranged on the other side of the top face of the sleeve, the sleeve and the valve are in a tightened and fixed state when the valve rod is adjusted, the sleeve does not need to be screwed off for adjusting the valve rod, time and labor are saved, and meanwhile the sleeve is prevented from being lost.

Description

Technical field:

[0001] The utility model relates to the technical field of protection, in particular to a valve stem protection device. Background technology:

[0002] The emergency shut-off valve is also called the safety shut-off valve. It is used to perform emergency shut-off treatment on key facilities such as toxic gases, highly toxic liquids and flammable gases in major hazardous sources. The solenoid valve coil is in a power-off state and does not consume electrical energy. When an accident occurs, the valve coil is instantly energized, triggering the valve to close quickly, and the valve stem that limits the valve position pops up, and the valve enters a self-locking state. A protective cover that is threaded with the valve is placed on the valve stem to prevent the valve stem from bouncing off.

[0003] The existing protective cover is mainly composed of a sleeve and a cover plate. The cover plate is fixed on the top surface of the sleeve to prevent the valve stem from bouncing off. When the valve needs to be restarted after being closed, the sleeve needs to be unscrewed to expose the valve stem, and then the valve stem is operated to limit the valve and then the sleeve is screwed on to protect the valve stem. The cover plate is fixedly connected to the sleeve, and the sleeve needs to be removed for valve stem adjustment. The connection between the sleeve and the valve is prone to rust, and the disassembly and assembly of the sleeve is time-consuming and laborious. There is no place to put the disassembled sleeve, which can easily lead to the loss of the sleeve. Utility model content:

[0004] To this end, the purpose of the utility model is to provide a valve stem protection device to overcome the existing technology because the existing protective cover is mainly composed of a sleeve and a cover plate, the cover plate is fixed on the top surface of the sleeve to prevent the valve stem from bouncing, and when the valve needs to be restarted after closing, the sleeve needs to be unscrewed to expose the valve stem, and then the valve stem is operated to limit the valve and then the sleeve is screwed on to protect the valve stem. The cover plate is fixedly connected to the sleeve, and the sleeve needs to be removed for valve stem adjustment. The connection between the sleeve and the valve is prone to rust, and the disassembly and assembly of the sleeve is time-consuming and labor-intensive. There is no place to put the disassembled sleeve, which can easily lead to the problem of sleeve loss.

[0005] The utility model is implemented by the following technical solutions:

[0006] A valve stem protection device includes a sleeve screwed on a valve body, the sleeve covers the valve stem, the top surface of the sleeve is fixedly connected to a positioning mechanism, a cover plate is slidably sleeved on the positioning mechanism, the bottom surface of the cover plate is in contact with the top surface of the sleeve and is arranged directly above the top opening of the sleeve, and the sliding of the cover plate can open and close the top opening of the sleeve.

[0007] Preferably, the top surface of the cover plate is a corrugated surface.

[0008] Preferably, the positioning mechanism includes an n-shaped sliding rod, two vertical rods of the n-shaped sliding rod are fixedly connected to one side of the top surface of the sleeve, the cross bar of the n-shaped sliding rod is fitted with a square through groove, the square through groove is opened on the side wall of the cover plate, and a plurality of guide rods are symmetrically inserted and slidably provided in the cross bar of the n-shaped sliding rod, the guide rods are arranged in the square through groove and both ends pass through the cross bar of the n-shaped sliding rod and are fixedly connected to the surface of the cover plate, a plurality of compression springs are fixedly connected between the cover plate surface and the cross bar of the n-shaped sliding rod, the compression springs are arranged in the square through groove and sleeved on the guide rods.

[0009] Preferably, the distance between the two vertical rods of the n-shaped sliding rod is equal to the width of the cover plate.

[0010] Preferably, the cross-bar and vertical bar cross-sections of the n-shaped sliding bar are both square.

[0011] Preferably, two dovetail blocks are symmetrically fixedly connected to the bottom surface of the cover plate, the dovetail blocks are slidably arranged in the dovetail groove, the dovetail groove is opened on the top surface of the sleeve, and the dovetail blocks are arranged on the other side of the top surface of the sleeve.

[0012] The advantages of the utility model are as follows: the cover plate is slidably connected to the sleeve through the positioning mechanism to protect the valve stem. When the valve stem needs to be adjusted, the cover plate is pushed to slide so that the top end opening of the sleeve is opened, and the valve stem is adjusted from the top end of the sleeve. When the valve stem is adjusted, the sleeve and the valve are also in a tightened and fixed state. There is no need to unscrew the sleeve to adjust the valve stem, which saves time and effort while preventing the sleeve from being lost. Description of the drawings:

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is the structural diagram of the utility model;

[0015] Figure 2 It is the front view of the structure described in the utility model;

[0016] Figure 3 It is a partial top view of the structure of the utility model;

[0017] Figure 4 It is a three-dimensional diagram of the structure of the utility model.

[0018] In the figure: sleeve 1, cover plate 2, n-shaped slide rod 3, square through groove 4, guide rod 5, compression spring 6, dovetail groove 7, dovetail block 8. Specific implementation method:

[0019] In order to make the purpose and advantages of the utility model more clearly understood, the utility model is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0020] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0021] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0022] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0023] like Figure 1-Figure 4 As shown, the utility model provides the following technical solutions: a valve stem protection device includes a sleeve 1 screwed on the valve body, the sleeve 1 covers the valve stem, the top surface of the sleeve 1 is fixedly connected with a positioning mechanism, a cover plate 2 is slidably sleeved on the positioning mechanism, the bottom surface of the cover plate 2 is in contact with the top surface of the sleeve 1 and is arranged directly above the top end opening of the sleeve 1, and the sliding of the cover plate 2 can open and close the top end opening of the sleeve 1.

[0024] The top surface of the cover plate 2 is a corrugated surface, which facilitates sliding the cover plate 2 from the top end of the cover plate 2 .

[0025] Please combine Figure 1As shown, during use, when an accident occurs, the valve coil is energized instantaneously, triggering the valve to close quickly, and the valve stem that limits the valve position pops up. When the valve needs to be reopened, the staff is required to restore the valve stem to its original position. First, slide the cover plate 2, and the cover plate 2 gradually slides on the top of the sleeve 1, so that the opening at the top of the sleeve 1 is gradually exposed, and then operate the valve stem from the opening at the top of the sleeve 1 to reset the valve stem. There is no need to unscrew the sleeve 1 to reset the valve stem. When adjusting the valve stem, the sleeve and the valve are also in a tightened and fixed state. There is no need to unscrew the sleeve to adjust the valve stem, which saves time and effort while preventing the sleeve from being lost.

[0026] Please combine Figure 1 , Figure 2 , Figure 3 As shown, an embodiment of the positioning mechanism, the positioning mechanism includes an n-shaped slide bar 3, two vertical bars of the n-shaped slide bar 3 are fixedly connected to one side of the top surface of the sleeve 1, a square through groove 4 is fitted on the cross bar of the n-shaped slide bar 3 for sliding, the square through groove 4 is opened on the side wall of the cover plate 2, and a plurality of guide rods 5 are symmetrically penetrated and slidably provided in the cross bar of the n-shaped slide bar 3, the guide rods 5 are arranged in the square through groove 4 and the two ends pass through the cross bar of the n-shaped slide bar 3 and are fixedly connected to the surface of the cover plate 2, a plurality of compression springs 6 are fixedly connected between the surface of the cover plate 2 and the cross bar of the n-shaped slide bar 3, the compression springs 6 are arranged in the square through groove 4 and are sleeved on the guide rods 5.

[0027] The distance between the two vertical rods of the n-shaped slide bar 3 is equal to the width of the cover plate 2. The two vertical rods of the n-shaped slide bar 3 clamp the cover plate 2 to increase the cross-sectional area of ​​the cover plate 2, thereby improving the stability of the cover plate 2 when sliding and preventing the cover plate 2 from shaking.

[0028] The cross-bar and vertical-bar cross-sections of the n-shaped sliding bar 3 are both square, which increases the contact area with the surface of the cover plate 2 .

[0029] Please combine Figure 1 As shown, during use, when the sliding cover plate 2 is performed, the cover plate 2 drives the square through groove 4 to slide on the n-shaped slide rod 3, and the cover plate 2 drives the guide rod 5 to slide in the n-shaped slide rod 3. The cover plate 2 slides and squeezes the compression spring 6 to deform, and the cover plate 2 gradually slides on the sleeve 1 to expose the opening at the top of the sleeve 1, and then the valve stem is adjusted from the opening at the top of the sleeve 1 to reset. After the valve stem is reset, the cover plate 2 is released. At this time, the deformed compression spring 6 pushes the cover plate 2 to slide and covers the opening at the top of the sleeve 1 to protect the valve stem and prevent the valve stem from bouncing off. The valve stem is adjusted from the top of the sleeve. When the valve stem is adjusted, the sleeve and the valve are also in a tightened and fixed state. There is no need to unscrew the sleeve to adjust the valve stem, which saves time and effort while preventing the sleeve from being lost.

[0030] Please combine Figure 2 , Figure 4As shown, two dovetail blocks 8 are symmetrically fixedly connected to the bottom surface of the cover plate 2. The dovetail blocks 8 are slidably arranged in the dovetail groove 7. The dovetail groove 7 is opened on the top surface of the sleeve 1, and the dovetail blocks 8 are arranged on the other side of the top surface of the sleeve 1.

[0031] Please combine Figure 2 As shown, during use, when the cover plate 2 slides, the cover plate 2 drives the dovetail block 8 to slide in the dovetail groove 7. The arrangement of multiple dovetail grooves 7 and dovetail blocks 8 serves to connect the sleeve 1 and the cover plate 2, thereby improving the stability of the connection between the sleeve 1 and the cover plate 2.

[0032] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A valve stem protection device, comprising a sleeve threaded on a valve body, wherein the sleeve covers the valve stem, and is characterized in that: The top surface of the sleeve is fixedly connected with a positioning mechanism, and a cover plate is slidably sleeved on the positioning mechanism. The bottom surface of the cover plate fits the top surface of the sleeve and is arranged just above the top opening of the sleeve. The sliding of the cover plate can open and close the top opening of the sleeve.

2. A valve stem protection device according to claim 1, characterized in that: The top surface of the cover plate is a corrugated surface.

3. A valve stem protection device according to claim 2, characterized in that: The positioning mechanism includes an n-shaped sliding rod, two vertical rods of the n-shaped sliding rod are fixedly connected to one side of the top surface of the sleeve, a square through groove is fitted on the cross rod of the n-shaped sliding rod for sliding, the square through groove is opened on the side wall of the cover plate, and a plurality of guide rods are symmetrically inserted and slidably provided in the cross rod of the n-shaped sliding rod, the guide rods are arranged in the square through groove and the two ends pass through the cross rod of the n-shaped sliding rod and are fixedly connected to the surface of the cover plate, a plurality of compression springs are fixedly connected between the surface of the cover plate and the cross rod of the n-shaped sliding rod, and the compression springs are arranged in the square through groove and sleeved on the guide rods.

4. A valve stem protection device according to claim 3, characterized in that: The distance between the two vertical rods of the n-shaped sliding rod is equal to the width of the cover plate.

5. A valve stem protection device according to claim 4, characterized in that: The cross-bar and vertical-bar cross-sections of the n-shaped slide bar are both square.

6. A valve stem protection device according to any one of claims 3 to 5, characterized in that: The bottom surface of the cover plate is symmetrically fixedly connected with two dovetail blocks, the dovetail blocks are slidably arranged in the dovetail groove, the dovetail groove is opened on the top surface of the sleeve, and the dovetail blocks are arranged on the other side of the top surface of the sleeve.

Images