A valve core structure for black water media conditions

Abstract

This utility model discloses a valve core structure for black water media operation, including a bolt. An axially threaded hole is provided at the connecting end of a connecting rod, and a threadless bolt through hole is provided at the center of the valve core. The opening section of the threadless bolt through hole is a countersunk section, and the inner wall of the inner section of the countersunk section is an axial force-bearing surface. The bolt passes through the threadless bolt through hole of the valve core and is screwed into the threaded hole of the connecting rod. The bolt head presses against the axial force-bearing surface of the countersunk section, pressing and fixing the valve core to the end of the connecting rod. The axial force-bearing surface is a conical inner conical surface, and the bolt head has an outer conical surface that presses against the inner conical surface. Its advantages are: it avoids dynamic welding, maintains the original physical strength and oxidation resistance of the connection area between the connecting rod and the valve core; it facilitates rapid assembly and improves processing efficiency.

Description

Technical Field

[0001] This utility model relates to a valve core structure for black water media conditions, and belongs to the field of wear-resistant valve core technology. Background Technology

[0002] Black water refers to water that emerges from underground during drilling. This color indicates that the water contains a large amount of certain organic mineral components, such as coal or oil. The valve core of the water valve used in black water drilling tools still needs to have high wear resistance to improve its service life.

[0003] Water valves used for black water media have a connecting rod at the top of the valve core, used to lift or lower the valve core to control the opening and closing of the water valve. To reduce manufacturing costs, only the valve core area uses expensive hard alloy materials, but a reliable connection must be maintained between the valve core and the connecting rod. Existing technology typically uses physical connection plus welding to solve the connection problem between the valve core and the connecting rod. However, welding generates high temperatures, affecting the physical and chemical properties of the valve core and connecting rod in that area, such as reduced hardening degree and oxidation resistance. Furthermore, welding requires precise precision, resulting in very low processing efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to simply and quickly implement physical connection between valve core and connecting rod, thereby avoiding dynamic welding, so as to ensure that the physical and chemical properties of the connection area are not weakened and to improve the connection processing efficiency.

[0005] To address the above problems, the technical solution proposed by this utility model is as follows:

[0006] A valve core structure for black water media operation includes a bolt, an axial threaded hole at the connecting end of a connecting rod, and a threadless bolt through hole at the center of the valve core. The opening section of the threadless bolt through hole is a countersunk section, and the inner wall of the inner section of the countersunk section is an axial force-bearing surface. The bolt passes through the threadless bolt through hole of the valve core and is screwed into the threaded hole of the connecting rod. The bolt head presses against the axial force-bearing surface of the countersunk section to press and fix the valve core to the end of the connecting rod.

[0007] The axial force-bearing surface is a conical inner conical surface, and the bolt head has an outer conical surface that presses against the inner conical surface.

[0008] The taper of the inner and outer conical surfaces is 5°–12°.

[0009] The connecting end of the connecting rod is provided with a limiting groove, and the connecting end of the valve core is provided with a limiting platform that cooperates with the limiting groove. When the connecting rod and the valve core are connected and fixed, the limiting platform is located in the limiting groove.

[0010] The connecting rod has a radial pin hole 1 on its outer periphery and a threaded hole. The bolt has a radial pin hole 2 that is coaxial with the radial pin hole. The radial pin hole 1 and the radial pin hole 2 have a positioning pin to prevent the bolt from rotating.

[0011] The outer diameter of the valve core is larger than the outer diameter of the connecting rod. Beneficial effects

[0012] 1. It can avoid dynamic welding and maintain the original physical strength and oxidation resistance of the connection area between the connecting rod and the valve core;

[0013] 2. Facilitates rapid assembly and improves processing efficiency. Attached Figure Description

[0014] Figure 1 A cross-sectional view of the valve core and connecting rod to complete the assembly;

[0015] Figure 2 A three-dimensional schematic diagram showing the disassembly of the valve core and the end of the connecting rod;

[0016] Figure 3 for Figure 1 A partial schematic diagram;

[0017] Figure 4 for Figure 3 A breakdown diagram.

[0018] In the diagram: 1. Connecting rod; 101. Threaded hole; 102. Limiting groove; 103. Radial pin hole one; 2. Valve core; 201. Through hole for threadless bolt; 2011. Countersunk section; 20111. Inner conical surface; 202. Limiting platform; 3. Bolt; 301. Bolt head; 3011. Outer conical surface; 302. Radial pin hole two; 4. Locating pin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] like Figure 1 As shown in Figure 3, a valve core structure for black water media includes a bolt 3. An axial threaded hole 101 is provided at the axial center of the connecting end of the connecting rod 1, and a threadless bolt through hole 201 is provided at the axial center of the valve core 2. The opening section of the threadless bolt through hole 201 is a countersunk section 2011, and the inner wall of the inner section of the countersunk section 2011 is an axial force-bearing surface. After the bolt 3 passes through the threadless bolt through hole 201 of the valve core 2, it is screwed into the threaded hole 101 of the connecting rod 1. The bolt head 301 of the bolt 3 presses against the axial force-bearing surface of the countersunk section 2011 to press and fix the valve core 2 to the end of the connecting rod 1. This can avoid dynamic welding, ensure that the physical and chemical properties of the connection area are not weakened, and improve the connection processing efficiency.

[0021] To facilitate tightening of bolts 3, bolt heads 301 are designed to be relatively long. After the valve core 2 is fixed on the connecting rod 1, the excess bolt heads 301 are ground flat until they are flush with the end face of the valve core 2.

[0022] like Figure 3 , 4 As shown, the axial force-bearing surface is a conical inner conical surface 20111, and the bolt head 301 of the bolt 3 has an outer conical surface 3011 that presses against the inner conical surface 20111. In order to facilitate a tighter expansion pressure in the countersunk section 2011 of the bolt head 301, and to make the connection between the connecting rod 1 and the valve core 2 more secure, the taper of both the inner conical surface 20111 and the outer conical surface 3011 is very small, located in the range of 5° to 12°, such as 5°, 8°, and 12°.

[0023] Furthermore, the connecting end of the connecting rod 1 is provided with a limiting groove 102, and the connecting end of the valve core 2 is provided with a limiting platform 202 that cooperates with the limiting groove 102. When the connecting rod 1 and the valve core 2 are connected and fixed, the limiting platform 202 is located in the limiting groove 102. In this way, misalignment between the end face of the connecting rod 1 and the end face of the valve core 2 can be avoided.

[0024] The connecting rod 1 has a radial pin hole 103 on its outer periphery that is identical to the threaded hole 101. The bolt 3 has a radial pin hole 302 that is coaxial with the radial pin hole 103. Both the radial pin hole 103 and the radial pin hole 302 contain locating pins 4 to prevent the bolt 3 from rotating. It should be noted that the radial pin hole 103 can be pre-machined during the manufacturing of the connecting rod, while the radial pin hole 302 is machined along the radial pin hole 103 after the bolt 3 is tightened.

[0025] The outer diameter of valve core 2 is larger than the outer diameter of connecting rod 1, so as to avoid the black water medium being subjected to the same scouring force as valve core 2.

[0026] The above embodiments are only used to describe the present invention more clearly, and should not be regarded as limiting the scope of protection covered by the present invention. Any equivalent modifications should be regarded as falling within the scope of protection covered by the present invention.

Claims

1. A valve core structure for black water media operation, characterized in that: The device includes a bolt (3), an axial threaded hole (101) at the end of the connecting rod (1), and a threadless bolt through hole (201) at the center of the valve core (2). The opening section of the threadless bolt through hole (201) is a countersunk section (2011), and the inner wall of the inner section of the countersunk section (2011) is an axial force-bearing surface. The bolt (3) passes through the threadless bolt through hole (201) of the valve core (2) and is screwed into the threaded hole (101) of the connecting rod (1). The bolt head (301) of the bolt (3) presses against the axial force-bearing surface of the countersunk section (2011) to press and fix the valve core (2) to the end of the connecting rod (1).

2. The valve trim structure for black water service as defined in claim 1, wherein: The axial force-bearing surface is a conical inner conical surface (20111), and the bolt head (301) of the bolt (3) has an outer conical surface (3011) that is pressed against the inner conical surface (20111).

3. The valve trim structure for black water service as defined in claim 2 wherein: The taper of the inner conical surface (20111) and the outer conical surface (3011) is 5°–12°.

4. The poppet structure for black water medium duty applications of claim 1, wherein: The connecting rod (1) has a limiting groove (102) at its connecting end, and the valve core (2) has a limiting platform (202) that cooperates with the limiting groove (102) at its connecting end. When the connecting rod (1) and the valve core (2) are connected and fixed, the limiting platform (202) is located in the limiting groove (102).

5. The poppet structure for black water medium duty applications of claim 1, wherein: The connecting rod (1) has the same radial pin hole one (103) between the outer periphery of the connecting end and the threaded hole (101). The bolt (3) is provided with a radial pin hole two (302) that is coaxial with the radial pin hole one (103). The radial pin hole one (103) and the radial pin hole two (302) have a positioning pin (4) for preventing the bolt (3) from rotating.

6. The poppet structure for black water medium duty applications of claim 1, wherein: The outer diameter of the valve core (2) is greater than the outer diameter of the connecting rod (1).

Images