Grease injection valve with pressure spring seat

Abstract

A grease injection valve with a pressure spring seat comprises a grease injection valve body provided with a containing cavity, a sealing steel ball and a pressure spring, the sealing steel ball and the pressure spring are arranged in the containing cavity, the grease injection valve further comprises the pressure spring seat, the pressure spring seat is arranged between the sealing steel ball and the pressure spring, the pressure spring seat is provided with a grease outlet axial channel, and the grease outlet axial channel is communicated with the containing cavity. The axis of the grease outlet axial channel and the axis of the pressure spring are coaxially arranged, and the grease outlet axial channel leads to the interior of the pressure spring. The pressure spring seat is further provided with at least one grease outlet lateral channel penetrating through the hole wall of the grease outlet axial channel, the grease outlet lateral channel is arranged above the end, close to the sealing steel ball, of the pressure spring, and the pressure spring seat and the inner wall of the containing cavity are arranged in a spaced mode. The pressure spring seat with the grease outlet channel is arranged between the sealing steel ball and the pressure spring, lubricating grease is guided into the pressure spring through the grease outlet channel, grease is discharged based on the space in the pressure spring, and grease is discharged smoothly under the condition that the pressure spring keeps stability.

Description

Technical Field

[0001] This application relates to the field of petroleum equipment, specifically to a grease injection valve with a spring seat. Background Technology

[0002] In oil wellhead equipment, a grease injection valve is located at the rotating part of the valve stem. When the valve stem rotation lubrication is abnormal, lubricating oil or grease is injected through the grease injection valve to lubricate the valve stem rotation.

[0003] In the prior art, patent publication number CN109340415A discloses an anti-locking one-way grease injection valve with a simple structure. However, to ensure the stability of the compression spring pressing against the receiving cavity, the compression spring needs to be fitted against the inner wall of the receiving cavity. The fit between the end face of the compression spring and the spherical surface of the sealing steel ball not only blocks the channel for grease to enter the compression spring but also blocks the channel for grease to pass through the compression spring and the receiving cavity, thus causing uneven grease discharge. How to ensure smooth grease discharge while maintaining the stability of the compression spring is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a grease injection valve with a spring seat to solve the technical problem of how to ensure smooth grease delivery while maintaining the stability of the spring.

[0005] This application discloses a grease injection valve with a spring seat, comprising a valve body having a receiving cavity, a sealing steel ball, and a spring, wherein the sealing steel ball and the spring are disposed within the receiving cavity. The valve also includes a spring seat disposed between the sealing steel ball and the spring, the spring seat having a grease outlet axial channel whose axis is coaxial with the axis of the spring and leads into the spring. The spring seat further includes at least one grease outlet lateral channel penetrating the wall of the grease outlet axial channel, the grease outlet lateral channel being located above the end of the spring near the sealing steel ball. The spring seat is spaced apart from the inner wall of the receiving cavity.

[0006] In some possible implementations, the compression spring seat is provided with a sealing steel ball contact portion, the sealing steel ball contact portion being funnel-shaped, and the conical surface of the sealing steel ball contact portion contacting the spherical surface of the sealing steel ball.

[0007] In some possible implementations, the compression spring seat includes a first part and a second part, the outer diameter of the first part is larger than the outer diameter of the second part, one end of the first part is coaxially connected to one end of the second part; the compression spring is sleeved on the second part, and the end of the compression spring abuts against the end face of the first part; the grease outlet lateral channel is provided on the hole wall of the first part.

[0008] In some possible implementations, the second portion is interference-fitted with the compression spring.

[0009] In some possible implementations, the compression spring seat is made of 304 stainless steel.

[0010] Beneficial effects: By setting a compression spring seat with a grease outlet channel between the sealing steel ball and the compression spring, the grease is guided into the compression spring through the grease outlet channel. Based on the space inside the compression spring, the grease is discharged smoothly while maintaining the stability of the compression spring.

[0011] Other advantages, objectives, and features of this application will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be learned from practice of this application. The objectives and other advantages of this application can be realized and obtained through the following description. Attached Figure Description

[0012] The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain and illustrate this application, and should not be construed as limiting the scope of protection of this application.

[0013] Figure 1 This is a structural diagram of the grease injection valve of this application;

[0014] Figure 2 This is a cross-sectional view of the compression spring seat of this application;

[0015] The components are: 1. Grease injection valve body; 2. Sealing steel ball; 3. Compression spring; 4. Compression spring seat; 11. Receiving cavity; 41. Sealing steel ball contact part; 42. First part; 43. Second part; 44. Grease outlet axial channel; 45. Grease outlet lateral channel. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0017] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0018] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0019] In the above description of this application, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use. They are only used for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0020] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0021] In oil wellhead equipment, a grease injection valve is located at the rotating part of the valve stem. When the valve stem rotation lubrication is abnormal, lubricating oil or grease is injected through the grease injection valve to lubricate the valve stem rotation.

[0022] In the prior art, patent publication number CN109340415A discloses an anti-locking one-way grease injection valve with a simple structure. However, in order to ensure the stability of the compression spring pressing on the receiving cavity, the compression spring needs to be attached to the inner wall of the receiving cavity. The end face of the compression spring is attached to the spherical surface of the sealing steel ball, which not only blocks the channel for grease to enter the compression spring, but also blocks the channel for grease to pass through the compression spring and the receiving cavity, thus causing the grease to not flow smoothly.

[0023] like Figure 1-2 As shown, this embodiment discloses a grease injection valve with a spring seat, which allows grease to flow smoothly while maintaining the stability of the spring 3. It includes a grease injection valve body 1 with a receiving cavity 11, a sealing steel ball 2, a spring 3 and a spring seat 4. The sealing steel ball 2, the spring 3 and the spring seat 4 are disposed in the receiving cavity 11, and the spring seat 4 is disposed between the sealing steel ball 2 and the spring 3.

[0024] The compression spring seat 4 is provided with a grease outlet axial channel 44, the axis of which is coaxial with the axis of the compression spring 3, and the grease outlet axial channel 44 leads into the interior of the compression spring 3; the compression spring seat 4 is also provided with at least one grease outlet lateral channel 45 penetrating the hole wall of the grease outlet axial channel 44, the grease outlet lateral channel 45 is located above the end of the compression spring 3 near the sealing steel ball 2, and the compression spring seat 4 is spaced apart from the inner wall of the receiving cavity 11.

[0025] The compression spring seat 4 is provided with a sealing steel ball contacting part 41, which is funnel-shaped. The conical surface of the sealing steel ball contacting part 41 contacts the spherical surface of the sealing steel ball 2. The compression spring seat 4 includes a first part 42 and a second part 43. The outer diameter of the first part 42 is larger than the outer diameter of the second part 43. One end of the first part 42 is coaxially connected to one end of the second part 43. The compression spring 3 is sleeved on the second part 43, and the end of the compression spring 3 abuts against the end face of the first part 42. The grease outlet side channel 45 is provided on the hole wall of the first part 42. The second part 43 and the compression spring 3 are interference-fitted. In the prior art, the assembly is done manually. During assembly, the grease injection valve body 1 is grease-poured. First, the sealing steel ball 2 is placed into the grease injection valve body 1. Then, the spring seat 4 and the spring 3 are placed in sequence. However, the spring seat 4 is in line contact with the sealing steel ball 2, so the spring seat 4 cannot be in a vertical position. Therefore, the spring 3 cannot be accurately fitted onto the second part 43 of the spring 4. The depth of the receiving cavity 11 is about 25 mm, and the diameter of the receiving cavity is about 9.5 mm. The space is small, so the spring seat 4 may flip over during manual assembly. When the second part 43 is interference-fitted with the spring 3, the spring 3 and the spring seat 4 can be assembled into a whole before being placed into the receiving cavity. The outer diameter of the spring 3 is supported by the receiving cavity 11, so that the spring 3 and the spring seat 4 are in a vertical position, which facilitates the later riveting of the end of the receiving cavity 11, so that the spring 3 is pressed into the receiving cavity 11. The material of the spring seat 4 is 304.

[0026] By setting a compression spring seat with a grease outlet channel between the sealing steel ball and the compression spring, the grease is guided into the compression spring through the grease outlet channel. Based on the space inside the compression spring, the grease is discharged smoothly while maintaining the stability of the compression spring.

[0027] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this application and form different embodiments.

[0028] Those skilled in the art will understand that the descriptions of the various embodiments have different focuses, and for parts not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0029] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application. All such modifications and variations fall within the scope defined by the appended claims. The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this invention, and these modifications or substitutions should all be covered within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A grease injection valve with a spring seat, comprising a valve body having a receiving cavity, a sealing steel ball, and a spring, wherein the sealing steel ball and the spring are disposed within the receiving cavity, characterized in that, Also includes: A compression spring seat is disposed between the sealing steel ball and the compression spring. The compression spring seat has a grease outlet axial channel, the axis of which is coaxial with the axis of the compression spring and leads into the compression spring. The compression spring seat also has at least one grease outlet lateral channel penetrating the wall of the grease outlet axial channel. The grease outlet lateral channel is located above the end of the compression spring near the sealing steel ball. The compression spring seat is spaced apart from the inner wall of the receiving cavity.

2. The grease injection valve with spring seat according to claim 1, characterized in that, The compression spring seat is provided with a sealing steel ball contact part, which is funnel-shaped, and the conical surface of the sealing steel ball contact part is in contact with the spherical surface of the sealing steel ball.

3. The grease injection valve with spring seat according to claim 2, characterized in that, The compression spring seat includes a first part and a second part. The outer diameter of the first part is larger than the outer diameter of the second part. One end of the first part is coaxially connected with one end of the second part. The compression spring is sleeved on the second part, and the end of the compression spring abuts against the end face of the first part. The grease outlet side channel is provided on the hole wall of the first part.

4. The grease injection valve with spring seat according to claim 3, characterized in that, The second part is interference-fitted with the compression spring.

5. The grease injection valve with spring seat according to claim 4, characterized in that, The spring seat is made of 304 stainless steel.

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