Detachable rotary valve body

Abstract

The utility model discloses a detachable rotary valve body, which relates to the technical field of valve body assemblies, and comprises a valve cover, a guide claw, a bearing and a snap ring, the valve cover comprises a cover body and a rotating shaft, and the rotating shaft extends along the central axis of the cover body and is fixedly connected with the cover body; a shaft hole penetrates through the center of the guide claw, and the guide claw can be rotationally connected to the rotating shaft through the shaft hole; the bearing can sleeve one end, close to the cover body, of the rotating shaft and is positioned between the rotating shaft and the guide claw; the clamping ring can be clamped to the end, away from the cover body, of the rotating shaft so that the guide claw can be installed on the rotating shaft. The utility model has the advantages of long service life and low replacement cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a valve body assembly technical field, in particular to a detachable rotary valve body. BACKGROUND

[0002] Valve body assembly includes valve body and valve rubber, it is applied to a kind of one-way valve assembly of pump liquid force end of cementing pump, mud pump and fracturing pump etc.;When fluid flows in the direction, the pressure of fluid pushes valve body assembly to leave valve seat, opens flow passage, when fluid flows in reverse, under the counter pressure of fluid, valve body assembly sits on valve seat, closes flow passage, realizes the effect of limiting mud one-way flow.In oilfield cementing operation, valve body assembly bears high-pressure fluid (such as acidification, quartz sand etc.) for a long time, erosion, working environment is very bad, its service life is 20-30 hours, consumption is very big, is the main wearing parts of cementing pump etc.

[0003] As shown in Figure 1 Traditional valve body is integral valve body, i.e. the valve cover of valve body upper portion and the guide claw of valve body lower portion are integrated structure, its main damage failure reason is that: in the process of valve body descending closing, guide claw and valve seat are easy to be mixed with particle medium, make guide claw jam in valve seat, further under the counter pressure, it can lead to guide claw deformation, even fracture, and integral valve body guide claw once appears deformation, fracture, needs to replace entire valve body, cost is higher.

[0004] It can be seen that how to improve the service life of wearing part valve body is the problem to be solved at present. INVENTION CONTENTS

[0005] The utility model aims at providing a detachable rotary valve body to solve the problems in the above related technologies, long service life, low replacement cost.

[0006] To achieve the above object, the utility model provides the following scheme:

[0007] The utility model provides a detachable rotary valve body, including valve cover, guide claw, bearing and snap ring, the valve cover includes cover body and pivot, the pivot extends along the center axis of the cover body, and is fixedly connected with the cover body;The center of the guide claw is penetrated by shaft hole, and the guide claw can be rotatably connected to the pivot through the shaft hole;The bearing can be sleeved on one end of the pivot close to the cover body, and is located between the pivot and the guide claw;The snap ring can be clamped on one end of the pivot away from the cover body, so that the guide claw is installed on the pivot.

[0008] Preferably, the guide claw is three-claw structure.

[0009] Preferably, the bearing is a rolling bearing.

[0010] Preferably, the snap ring is a C-shaped snap ring.

[0011] Preferably, the cover and the shaft are of an integral structure.

[0012] Preferably, the valve cover and the guide claw are forgings.

[0013] The utility model discloses relative to relevant technologies has obtained following technical effect:

[0014] The utility model discloses a detachable rotary valve body, including valve cover, guide claw, bearing and snap ring, the valve cover includes cover and shaft, when assembling, first bearing is installed on the shaft of valve cover, then is sleeved into guide claw, then installs snap ring at the tail of shaft.

[0015] When using, the valve rubber is installed on the cover of valve cover, and the working mode of the detachable rotary valve body provided by the utility model in the well cementation pump is explained: when fluid is pushed away from the valve body from the bottom hole of valve seat under the action of negative pressure, the fluid is opened upward, and the fluid (usually with certain spiral flow) is driven to rotate when passing through the guide claw, and at the same time, the fluid follows the guide claw to form vortex flow and rushes upward, realizes the dispersion fluid effect, avoids that the fluid containing particulate medium linearly washes the valve rubber, at this time, the pressure and washing point of the valve rubber are evenly distributed on the whole valve rubber pressure bearing surface, avoids that the working surface of the valve rubber is long-termly washed, abraded and eroded by high-pressure fluid medium in local position, prolongs the service life of the valve rubber.

[0016] When fluid enters the well cementation pump cavity, the well cementation pump cavity is forced to descend and close rapidly under the action of counter pressure, and the valve body free fall and the valve rubber are in airtight state, at this time, since the valve body is rotary, the guide claw can rotate, therefore, the guide claw and the valve seat are not easy to be mixed with particulate medium, can avoid that the guide claw is stuck in the valve seat, reduces the risk that the guide claw is deformed and fractured under the action of counter pressure, prolongs the service life of the guide claw, simultaneously, guarantees that the valve body normally descends and closes, realizes the sealing effect.

[0017] At present, the service life of the traditional integral valve body under the pressure of 90 megapascal is generally 20-30 hours, and the whole valve body needs to be replaced when exceeding the service life, but the detachable rotary valve body provided by the utility model can remove the damaged part (valve cover or guide claw) and replace the new accessory to continue to use, reduces the replacement cost, and the service life of the utility model is expected to be twice that of the traditional one, and the service life of the valve rubber installed on the utility model can be expected to be doubled. DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 is a sectional view of a traditional integral valve body;

[0020] Figure 2 is a sectional view of a detachable rotary valve body provided by the embodiments of the present application;

[0021] Figure 3 is a first angle schematic view of the detachable rotary valve body provided by the embodiments of the present application;

[0022] Figure 4 is a second angle schematic view of the detachable rotary valve body provided by the embodiments of the present application;

[0023] Figure 5 is a third angle schematic view of the detachable rotary valve body provided by the embodiments of the present application.

[0024] In the figure: 1-valve cover, 101-cover body, 102-rotating shaft, 2-guiding claw, 3-bearing, 4-clasp ring. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] The present application aims to provide a detachable rotary valve body to solve the problems in the related art, and has a long service life and low replacement cost.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail in combination with the drawings and specific embodiments.

[0028] As Figures 2-5As shown, the embodiment provides a detachable rotary valve body, which comprises a valve cover 1, a guide claw 2, a bearing 3 and a snap ring 4. The valve cover 1 comprises a cover body 101 and a rotating shaft 102, the rotating shaft 102 extends along the central axis of the cover body 101 and is fixedly connected with the cover body 101. The guide claw 2 is provided with an axial hole in the center, and the guide claw 2 is rotatably connected to the rotating shaft 102 through the axial hole. The bearing 3 can be sleeved on one end of the rotating shaft 102 close to the cover body 101 and is located between the rotating shaft 102 and the guide claw 2. The snap ring 4 can be clamped on the other end of the rotating shaft 102 away from the cover body 101, so that the guide claw 2 is installed on the rotating shaft 102.

[0029] In the embodiment, the guide claw 2 is a three-claw structure.

[0030] It should be noted that the tapered surface of the valve body in contact with the valve seat needs to bear high pressure impact, and the guide claw 2 mainly plays a guiding role. The guide claw of the traditional integral valve body is a four-claw structure. In order to ensure the flow channel space, the claw is made relatively thin, which greatly reduces the strength of the claw. The guide claw 2 in the embodiment is a three-claw structure, which can be made relatively thick while ensuring the flow channel space, thereby improving the strength of the claw.

[0031] In the embodiment, the bearing 3 is a rolling bearing.

[0032] In the embodiment, the snap ring 4 is a C-shaped snap ring.

[0033] In the embodiment, the cover body 101 and the rotating shaft 102 are an integral structure.

[0034] In the embodiment, the valve cover 1 and the guide claw 2 are forgings.

[0035] It should be noted that the traditional integral valve body has a complex structure, and it is difficult to approach the finished product in size. A large amount of excess material needs to be removed on the equipment, which not only consumes time, but also causes a large amount of waste of raw materials. In addition, it is difficult to finely and specially strengthen the parts with different use functions for the integral valve body. The valve cover 1 and the guide claw 2 in the embodiment adopt a split design, so that the forging die structure of the two is simple, and a more fine product can be forged, the size is closer to the finished product, the consumption of materials is greatly reduced, and the organizational performance of the product will be more stable and reliable. The stable core organization is directly related to the service life of the product.

[0036] The working principle of the detachable rotary valve body provided in the embodiment is as follows:

[0037] During assembly, first install the bearing 3 on the rotating shaft 102 of the valve cover 1, then insert the guide claw 2, and finally install the retaining ring 4 at the tail of the rotating shaft 102; during use, install the valve rubber on the cover body 101 of the valve cover 1. The working method of the detachable rotary valve body provided in this embodiment in the cementing pump is described as follows: When the fluid is subjected to negative pressure, it pushes open the valve body from the bottom through hole of the valve seat, causing it to open upward. When the fluid (usually with a certain swirling flow) passes through the guide claw 2, it drives the guide claw 2 to rotate. Figure 5 (The direction of the middle arrow indicates the rotation direction of guide claw 2). Simultaneously, the fluid follows guide claw 2 to form a vortex flow that rushes upward, achieving a fluid dispersion effect and preventing the fluid containing particulate media from directly scouring the valve. At this time, the pressure and scouring points of the valve are evenly distributed across the entire pressure-bearing surface of the valve, preventing localized areas of the valve's working surface from being scoured, worn, and corroded by high-pressure fluid media for a long time, thus extending the service life of the valve. When the fluid enters the cementing pump chamber, the reaction pressure in the cementing pump chamber forces the valve to descend and close rapidly. The valve falls freely and is in a sealed state with the valve. At this time, since the valve is rotating, its guide claw 2 can rotate. Therefore, it is not easy for particulate media to get trapped between guide claw 2 and the valve seat, which can prevent guide claw 2 from getting stuck in the valve seat, reduce the risk of guide claw 2 deforming and breaking under reaction pressure, extend the service life of guide claw 2, and at the same time ensure the normal descent and closure of the valve, achieving a sealing effect.

[0038] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A detachable rotary valve, characterized in that: The device includes a valve cover, guide claws, a bearing, and a retaining ring. The valve cover includes a cover body and a rotating shaft. The rotating shaft extends along the central axis of the cover body and is fixedly connected to the cover body. The guide claw has a through-hole in its center and can be rotatably connected to the rotating shaft through the through-hole. The bearing can be sleeved on the end of the rotating shaft near the cover body and is located between the rotating shaft and the guide claw. The retaining ring can be engaged with the end of the rotating shaft away from the cover body so that the guide claw is mounted on the rotating shaft.

2. The detachable rotary valve according to claim 1, characterized in that: The guide claw has a three-claw structure.

3. The detachable rotary valve according to claim 1, characterized in that: The bearing is a rolling bearing.

4. The detachable rotary valve according to claim 1, characterized in that: The retaining ring is a C-type retaining ring.

5. The detachable rotary valve according to claim 1, characterized in that: The cover and the pivot are an integral structure.

6. The detachable rotary valve according to claim 1, characterized in that: Both the valve cover and the guide claw are forgings.

Images