Novel protection structure of valve safety pin

Abstract

The utility model discloses a novel valve safety pin protection structure which comprises a valve rod sleeve, a valve rod and a safety pin are arranged in the valve rod sleeve, the safety pin vertically penetrates through the valve rod in the radial direction, a packing gland is arranged below the valve rod sleeve, a bearing is arranged on the packing gland, the packing gland is arranged on the valve rod in a sleeved mode, and the bearing is arranged on the bearing. Two semicircular grooves are formed in the peripheral surface of the valve rod, a semicircular ring is arranged in each of the two semicircular grooves, the inner walls of the semicircular rings are in interference fit with the bottoms of the semicircular grooves, the two semicircular rings are located in the bearing, and the outer walls of the two semicircular rings are in tight fit with the inner ring of the bearing. According to the novel protection structure of the valve safety pin, the axial stress of the safety pin during use is reduced, and the safety pin only bears torsional force, so that the safety pin can be protected, and the use reliability of a valve is ensured.

Description

Technical Field

[0001] The utility model relates to a protection structure for a new type of valve safety pin, belonging to the technical field of valve body products in oil and gas exploitation. Background Technique

[0002] In recent years, the demand for the use of mineral resources such as oil and natural gas in China has increased significantly, and the number of valves used for related purposes has also been increasing day by day. The safety pin in the valve is used to transmit torque and is also a protection mechanism. However, the torsional pin in the traditional valve is subjected to complex forces (torsional force and shear force at the same time). During the daily opening and closing process of the valve, due to different use environments, the opening and closing torque will be affected. If the designed breaking torque value of the safety pin is inaccurate, it is very easy to be twisted off during daily use, resulting in the valve being unable to open and close normally. At the same time, the replacement of the safety pin is also relatively cumbersome, affecting the work process. Content of the Utility Model

[0003] The purpose of the utility model is to provide a protection structure for a new type of valve safety pin. The protection structure for the new type of valve safety pin reduces the axial force on the safety pin during use, so that the safety pin only bears the torsional force. Therefore, the safety pin can be protected, ensuring the reliability of valve use.

[0004] To solve the above technical problems, a technical solution adopted by the utility model is: to provide a protection structure for a new type of valve safety pin, which includes a valve stem sleeve. A valve stem and a safety pin are arranged in the valve stem sleeve. The safety pin radially penetrates the valve stem vertically. A packing gland is arranged below the valve stem sleeve. A bearing is arranged on the packing gland. The packing gland is sleeved on the valve stem. Two semi-circular grooves are arranged on the outer peripheral surface of the valve stem. One semi-circular ring is arranged in each of the two semi-circular grooves. The inner wall of the semi-circular ring is in interference fit with the bottom of the semi-circular groove. The two semi-circular rings are located inside the bearing, and the outer walls of the two semi-circular rings are in tight fit with the inner ring of the bearing.

[0005] Preferably, the two semi-circular grooves are arranged axially symmetrically.

[0006] Preferably, the lower part of the bearing is located in the packing gland, and the two semi-circular rings are located in the upper part inside the bearing.

[0007] Preferably, the two semi-circular rings are located below the valve stem sleeve.

[0008] The beneficial effect of the utility model is: The protection structure for the new type of valve safety pin of the utility model reduces the axial force on the safety pin during use by arranging two semi-circular grooves on the outer peripheral surface of the valve stem, and one semi-circular ring is arranged in each of the two semi-circular grooves. The semi-circular ring effectively bears the axial force brought by the valve stem. Therefore, the axial force on the safety pin during use can be reduced, so that the safety pin only bears the torsional force. Therefore, the safety pin can be protected, ensuring the reliability of valve use. Brief Description of the Drawings

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, where:

[0010] Figure 1 is a schematic structural diagram of the protection structure of the new valve safety pin of the present invention;

[0011] Figure 2 is a cross-sectional view of the semi-circular groove and semi-circular ring of the valve stem in the protection structure of the new valve safety pin of the present invention;

[0012] Figure 3 is a cross-sectional view of the valve stem in the protection structure of the new valve safety pin of the present invention. Detailed Description of the Preferred Embodiments

[0013] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0014] Embodiments of the present invention:

[0015] The present invention provides a protection structure for a new valve safety pin. Please refer to Figures 1 to 3 , which includes a valve stem sleeve 1. A valve stem 2 and a safety pin 3 are arranged inside the valve stem sleeve 1. The safety pin 3 radially passes through the valve stem 2 vertically. A packing gland 4 is arranged below the valve stem sleeve 1. A bearing 5 is arranged on the packing gland 4. The packing gland 4 is sleeved on the valve stem 2. Two semi-circular grooves 6 are arranged on the outer peripheral surface of the valve stem 2. One semi-circular ring 7 is arranged in each of the two semi-circular grooves 6. The inner wall of the semi-circular ring 7 is in interference fit with the bottom of the semi-circular groove 6. The two semi-circular rings 7 are located inside the bearing 5. The outer walls of the two semi-circular rings 7 are in tight fit, that is, interference fit, with the inner ring of the bearing 5. In this way, the semi-circular ring 7 can rotate inside the bearing 5, and the valve stem 2 can also rotate.

[0016] Preferably, the two semi-circular grooves 6 are arranged axially symmetrically.

[0017] Preferably, the lower part of the bearing 5 is located in the packing gland 4, and the two semi-circular rings 7 are located in the upper part inside the bearing 5.

[0018] Preferably, the two semi-circular rings 7 are located below the valve stem sleeve 1.

[0019] Due to the existence of the two semi-circular rings 7, when the valve stem 2 has an axial movement tendency under the axial force, the axial force will be transmitted to the two semi-circular rings 7. The two semi-circular rings 7 will resist the axial force under the resistance of the bearing 5 and the packing gland 4, and will not transmit the axial force to the safety pin 3. Therefore, the axial force on the safety pin during use can be reduced, so that the safety pin only bears the torsional force during the opening and closing of the valve. Thus, the safety pin can be protected and the reliability of the valve use is ensured.

[0020] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A novel valve safety pin protection structure, comprising a valve stem sleeve, a valve stem and a safety pin are arranged in the valve stem sleeve, the safety pin radially and vertically passes through the valve stem, a packing gland is arranged below the valve stem sleeve, a bearing is arranged on the packing gland, and the packing gland is sleeved on the valve stem, characterized in that: Two semi-circular grooves are arranged on the outer circumferential surface of the valve stem, and a semi-circular ring is arranged in each of the two semi-circular grooves. The inner wall of the semi-circular ring is interference fit with the bottom of the semi-circular groove. The two semi-circular rings are located in the bearing, and the outer walls of the two semi-circular rings are tightly fit with the inner ring of the bearing.

2. The protective structure of the new valve safety pin according to claim 1 is characterized in that: The two semi-annular grooves are arranged axially symmetrically.

3. The protective structure of the new valve safety pin according to claim 2 is characterized in that: The lower part of the bearing is located in the packing gland, and two semicircular rings are located in the upper part of the bearing.

4. The new valve safety pin protection structure according to claim 3 is characterized in that: The two semicircular rings are located below the valve stem sleeve.

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