CN219317787U - Relief valve structure and slurry pump - Google Patents

Abstract

The utility model relates to a relief valve structure and a slurry pump, comprising: a valve body with a liquid discharging cavity and a mounting cavity coaxially communicated is formed inside; the pressure relief nozzle is arranged on the valve body, and a pressure relief cavity communicated with the installation cavity is arranged inside the pressure relief nozzle; a pre-tightening cap movably sleeved on one end of the valve body; a spring with one end fixed on the inner end wall surface of the pre-tightening cap, wherein the spring stretches into the mounting cavity and can be stretched or compressed; the ball body is arranged in the mounting cavity and can be in sealing abutting joint with the outer edge of the inner end of the liquid discharge cavity under the action of the elastic force of the spring, or the ball body is separated from the outer edge of the liquid discharge cavity under the action of the pressure from the liquid discharge cavity. When the pressure of the slurry applied to the ball body is greater than the elasticity of the spring acting on the ball body, the ball body is jacked to be separated from the conical surface, and the slurry enters the mounting cavity from the liquid discharging cavity and is discharged through the pressure release cavity for pressure release.

Description

Relief valve structure and slurry pump

Technical Field

The utility model relates to the technical field of slurry pumps, in particular to a pressure relief valve structure and a slurry pump.

Background

A mud pump is a machine that delivers flushing fluid such as mud or water into a borehole during drilling. Mud pumps are an important component of drilling equipment.

After the mud is pumped from the pumping port through the piston motion in the mud pump, the mud is discharged from the discharge port, the internal pressure of the pump head needs to be maintained in a set safety value in the mud discharge process, and the pressure needs to be timely released when the pressure is overlarge, so that the pressure is maintained to be stable, and therefore, a pressure release valve capable of automatically releasing the pressure needs to be designed, and normal operation is ensured.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide a pressure relief valve structure, which comprises:

a valve body with a liquid discharging cavity and a mounting cavity coaxially communicated is formed inside;

the pressure relief nozzle is arranged on the valve body, and a pressure relief cavity communicated with the installation cavity is formed in the pressure relief nozzle;

a pre-tightening cap movably sleeved on one end of the valve body;

a spring with one end fixed on the inner end wall surface of the pre-tightening cap, wherein the spring stretches into the mounting cavity and can be stretched or compressed;

the ball body is arranged in the mounting cavity and can be in sealing abutting joint with the outer edge of the inner end of the liquid discharge cavity under the action of the elastic force of the spring, or the ball body is separated from the outer edge of the liquid discharge cavity under the action of the pressure of the liquid discharge cavity.

In a further embodiment of the utility model, the pre-tightening cap is connected with the valve body through a screw thread fit, so that the pre-tightening cap can be close to or far from the valve body along the pivot direction of the pre-tightening cap.

In a further embodiment of the utility model, the drainage lumen diameter is smaller than the installation lumen diameter.

In the utility model, a further embodiment is that the liquid discharge cavity and the installation cavity are connected through a conical surface in a transitional mode, and the conical surface is in contact fit with the spherical surface.

In the utility model, a further embodiment is that the sphere is a steel ball.

Also provided is a mud pump comprising any of the relief valve structures of the above embodiments, the mud pump further comprising a pump head;

one side of the pump head is provided with a pressure relief opening, and the other end of the valve body, which is away from the pre-tightening cap, is butted with the pressure relief opening.

Compared with the prior art, the utility model has the beneficial effects that:

when the pressure of the slurry applied to the ball body is smaller than or equal to the elasticity of the spring acting on the ball body during the slurry discharging process of the slurry pump, the ball body is sealed against the outer edge of the inner end of the liquid discharging cavity, and the liquid discharging cavity is not communicated with the pressure releasing cavity; when the pressure of the slurry applied to the ball body is greater than the elasticity of the spring acting on the ball body, the ball body is jacked to be separated from the conical surface, the slurry enters the mounting cavity from the liquid discharging cavity and is discharged through the pressure release cavity to release pressure, and the pressure release is finished until the pressure in the pump head is less than or equal to the elasticity of the spring acting on the ball body, so that the pressure in the pump head is maintained within a safe value, and the pressure release control is automatically performed; the spring force of the spring is changed by adjusting the position of the pre-tightening cap on the valve body, so that different pressure safety values can be set, and various use parameters can be manufactured.

The utility model is described in further detail below with reference to the drawings and the detailed description.

Drawings

FIG. 1 is a schematic diagram of a mud pump according to the present utility model;

FIG. 2 is a schematic overall cross-sectional view of the relief valve structure of the present utility model mounted on a pump head;

fig. 3 is an enlarged schematic view of the portion D in fig. 2.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Examples of the embodiments are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements throughout or elements having like or similar functionality. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, fig. 1 is a schematic structural diagram of a slurry pump according to the present utility model; FIG. 2 is a schematic overall cross-sectional view of the relief valve structure of the present utility model mounted on a pump head; fig. 3 is an enlarged schematic view of the portion D in fig. 2.

The present utility model provides a relief valve structure, as shown in fig. 1, which is applied to a mud pump 1.

In this embodiment, as shown in fig. 1, the slurry pump 1 further includes a pump head 2, a pressure relief port 2A is provided on one side of the pump head 2, and a pressure relief valve structure is mounted on the pressure relief port 2A to perform pressure automatic control and relief, so that the pressure in the pump head 2 is maintained within a set safety value.

As shown in fig. 2, the relief valve structure includes: the inside is formed with the coaxial communicating valve body 3 of flowing back chamber 3A and installation cavity 3B, install the pressure release mouth 4 on valve body 3, the pressure release mouth 4 inside is the pressure release chamber 4A of intercommunication installation cavity 3B, the pretension cap 5 of activity cup joint on one end of valve body 3, one end is fixed the spring 6 at pretension cap 5 inner end wall face, spring 6 stretches into installation cavity 3B and spring 6 can be stretched or compression effect, spheroid 7, establish in installation cavity 3B and receive the elastic force effect of spring 6 can with the sealed butt of the outer edge of flowing back chamber 3A inner, or spheroid 7 receives from flowing back chamber 3A pressure effect and breaks away from with flowing back chamber 3A outer edge, the valve body 3 other end and the pressure release mouth 2A butt of deviating from pretension cap 5.

In this embodiment, as shown in fig. 2, the pre-tightening cap 5 is connected with the valve body 3 through a threaded fit, so that the pre-tightening cap 5 can be close to or far away from the valve body 3 along the pivot direction, so it can be understood that by rotating the pre-tightening cap 5 to change the position on the valve body 3, the length of the spring 6 can be extended or shortened, thereby changing the elastic force of the spring 6, and the magnitude of the acting force of the ball 7 on the spring 6 naturally varies.

In order to enable the ball 7 to controllably seal the liquid discharge cavity 3A, the diameter of the liquid discharge cavity 3A is smaller than that of the installation cavity 3B, and when the ball 7 is acted on by the spring 6, one scene can smoothly seal one end of the liquid discharge cavity 3A.

As shown in fig. 3, the liquid discharge cavity 3A and the installation cavity 3B are in transitional engagement through the conical surface 3C, the conical surface 3C is in surface contact fit with the sphere 7, and preferably, the sphere 7 is a steel ball, and the sphere 7 can be in surface contact fit with the circumferential surface of the conical surface 3C, so that optimal sealing butt joint is achieved.

When the pressure of the slurry borne by the ball 7 is smaller than or equal to the elasticity of the spring 6 acting on the ball 7 in the slurry discharging process of the slurry pump 1, the ball 7 is sealed against the outer edge of the inner end of the liquid discharging cavity 3A, and the liquid discharging cavity 3A is not communicated with the pressure releasing cavity 4A; when the pressure of the slurry received by the ball 7 is greater than the elasticity of the spring 6 acting on the ball 7, the ball 7 is jacked to be separated from the conical surface 3C, the slurry enters the installation cavity 3B from the liquid discharge cavity 3A and is discharged through the pressure release cavity 4A for pressure release, the pressure release is finished until the pressure in the pump head 2 is less than or equal to the elasticity of the spring 6 acting on the ball 7, and the pressure in the pump head 2 is maintained within a safe value for automatic pressure release control; by adjusting the position of the pre-tightening cap 5 on the valve body 3 to change the elastic force of the spring 6, different pressure safety values can be set, and various use parameters can be manufactured.

The above embodiments are only preferred embodiments of the present utility model, and the scope of the present utility model is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present utility model are intended to be within the scope of the present utility model as claimed.

Claims (6)

1. A pressure relief valve structure comprising:

a valve body with a liquid discharging cavity and a mounting cavity coaxially communicated is formed inside;

the pressure relief nozzle is arranged on the valve body, and a pressure relief cavity communicated with the installation cavity is formed in the pressure relief nozzle;

a pre-tightening cap movably sleeved on one end of the valve body;

a spring with one end fixed on the inner end wall surface of the pre-tightening cap, wherein the spring stretches into the mounting cavity and can be stretched or compressed;

the ball body is arranged in the mounting cavity and can be in sealing abutting joint with the outer edge of the inner end of the liquid discharge cavity under the action of the elastic force of the spring, or the ball body is separated from the outer edge of the liquid discharge cavity under the action of the pressure of the liquid discharge cavity.

2. A pressure relief valve structure according to claim 1, wherein said pre-tightening cap is threadably coupled to said valve body such that said pre-tightening cap is movable toward and away from said valve body in a pivotal direction thereof.

3. A pressure relief valve structure according to claim 1 wherein said drainage chamber diameter is smaller than said mounting chamber diameter.

4. A pressure relief valve structure according to claim 3 wherein said drainage chamber and said mounting chamber are in transitional engagement by a tapered surface in contact engagement with said spherical surface.

5. The pressure relief valve structure of claim 1, wherein said ball is a steel ball.

6. A mud pump comprising a pressure relief valve arrangement according to any one of claims 1-5, said mud pump further comprising a pump head;

one side of the pump head is provided with a pressure relief opening, and the other end of the valve body, which is away from the pre-tightening cap, is butted with the pressure relief opening.

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