Rotor hollow shunting automatic adjusting device

Abstract

The invention discloses a rotor hollow shunting automatic adjusting device which comprises a rotor, a stator matched with the rotor and an upper connector connected with one end of the stator, and an automatic adjusting device is arranged in the upper connector and connected with the rotor. The automatic adjusting device comprises a shell, an adjusting valve arranged in the shell and a connector connected with the shell which are sequentially connected from top to bottom, the adjusting valve comprises a valve body and a piston arranged in the valve body, a spring is connected between the inner end of the piston and the bottom of the valve body, the outer end of the piston is connected with an anti-turning head, and the connector is connected with the shell. A first overflowing hole and a second overflowing hole are formed in the shell and the adjusting valve, and the first overflowing hole and the second overflowing hole are both communicated with the space between the automatic adjusting device and the upper connector. By means of the hollow rotor and the automatic flow adjusting device, failure of the screw motor caused by too large flow in advance can be effectively prevented, on the basis that the service life of the screw drill is guaranteed, internal abrasion of the screw drill is reduced, and the construction efficiency is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of petroleum engineering, and more specifically, to a rotor hollow flow splitting automatic regulating device. Background Art

[0002] A positive displacement motor is an energy conversion device that uses mud or clear water as the power medium to convert the liquid pressure energy into mechanical energy. The rotational speed of the positive displacement motor is related to the displacement. The larger the displacement, the higher the rotational speed, and the faster the rotational speed, the positive displacement motor is prone to wear and failure. The mud flow rate used on site should be within the recommended range, otherwise it will affect the efficiency of the positive displacement motor and even increase the wear.

[0003] In order to better regulate the fluid flow rate and maximize the use efficiency of the positive displacement motor, it is necessary to design a positive displacement motor that can automatically regulate the flow rate, reduce the internal wear of the positive displacement motor on the basis of ensuring the service life of the positive displacement motor, and effectively improve the construction efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotor hollow flow splitting automatic regulating device that can effectively prevent the premature failure of the positive displacement motor caused by excessive flow rate and increase the service life of the tool.

[0005] The present invention is implemented as follows:

[0006] The present invention provides a rotor hollow flow splitting automatic regulating device, including a rotor, a stator cooperating with the rotor, and an upper joint connected to one end of the stator. The characteristics are as follows: an automatic regulating device is provided in the upper joint and connected to the rotor. The automatic regulating device includes a housing, a regulating valve installed in the housing, and a connecting head connected to the housing, which are connected in sequence from top to bottom. The regulating valve includes a valve body and a piston installed in the valve body. A spring is connected between the inner end of the piston and the bottom of the valve body. The outer end of the piston is connected with an anti-falling head. A first flow hole and a second flow hole are provided on the housing and the regulating valve, and both the first flow hole and the second flow hole are communicated with the space between the automatic regulating device and the upper joint. In the initial state, the outer periphery of the piston seals part of the first flow hole. A flow passage is provided between the valve body and the housing and is communicated with the hollow passage of the rotor.

[0007] According to the above technical solution, a throttle valve is provided at the end of the connecting head close to the regulating valve, and the flow passage is communicated with the hollow passage of the rotor after passing through the throttle valve.

[0008] According to the above technical solution, the longitudinal section of the valve body of the regulating valve is H-shaped. A spring and a piston are installed at one end, and the other end corresponds to the throttle valve. One side outer periphery of the valve body abuts against the inner wall of the housing, and there is a gap between the other side outer periphery of the valve body and the inner wall of the housing. A third flow hole is provided at the other end of the valve body, and the gap communicates the first flow hole and the third flow hole.

[0009] According to the above technical solution, the second overcurrent channel is arranged at the lower end of the spring corresponding to the housing and the valve body.

[0010] According to the above technical solution, at least one pair of the first overcurrent holes is provided, one of which is arranged at the abutting position of the housing and the valve body, and the other is arranged at the gap between the valve body and the housing, and the overcurrent channel is communicated with the gap.

[0011] According to the above technical solution, the housing is fixedly welded to the regulating valve body.

[0012] According to the above technical solution, the connector is connected through a centralizing ring arranged in the upper joint.

[0013] According to the above technical solution, the housing includes an upper housing and a lower housing connected to the upper housing. The piston passes through the upper housing and is connected to the anti-falling head, and the lower end of the lower housing is connected to the connector.

[0014] Technical effects and advantages of the present invention:

[0015] 1. Through the hollow rotor and the flow rate automatic regulating device of the present invention, it can effectively prevent the premature failure of the screw motor caused by excessive flow rate, reduce the internal wear of the screw drill while ensuring the service life of the screw drill, and effectively improve the construction efficiency;

[0016] 2. It can be used by optimizing the processing on the existing screw drill, and has the characteristics of low use cost, safety and reliability, etc.

[0017] 3. By optimizing the internal structure of the screw drill, the flow rate applicable range of the screw drill can be expanded. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic diagram of the flow channel when the spring in the automatic regulating device is not compressed;

[0020] Figure 3 is a schematic diagram of the flow channel when the spring in the automatic regulating device is compressed.

[0021] In the figure: 1, stator; 2, rotor; 3, automatic regulating device; 4, upper joint; 3-1, connecting joint; 3-2, throttle valve; 3-3, valve seat; 3-4, housing; 3-5, regulating valve; 3-6, spring; 3-7, upper housing; 3-8, piston; 3-9, anti-falling head assembly; 3-10, first overcurrent hole; 3-11, second overcurrent hole; 3-12, overcurrent channel, 3-13, third overcurrent hole. DETAILED DESCRIPTION OF THE INVENTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] As Figure 1 shown, this embodiment provides a rotor hollow shunt automatic adjustment device, which includes a rotor 2, a stator 1 cooperating with the rotor, and an upper joint 4 connected to one end of the stator. An automatic adjustment device 3 is provided in the upper joint 4 and is connected to the rotor 2 through a connector 3-1. The automatic adjustment device 3 includes a housing connected in sequence from top to bottom, a regulating valve 3-5 installed in the housing, and a connector 3-1 connected to the housing. The regulating valve 3-5 includes a valve body and a piston 3-8 installed in the valve body. A spring 3-6 is connected between the inner end of the piston 3-8 and the bottom of the valve body. The outer end of the piston 3-8 is connected to an anti-falling head 3-9. A first flow hole 3-10 and a second flow hole 3-11 are provided on the housing and the regulating valve. Both the first flow hole 3-10 and the second flow hole 3-11 are communicated with the space between the automatic adjustment device and the upper joint. In the initial state, the outer periphery of the piston 3-8 seals part of the first flow hole. A flow passage 3-12 is provided between the valve body and the housing and is communicated with the hollow passage of the rotor.

[0024] In this embodiment, a throttle valve 3-2 is provided at the end of the connector 3-1 close to the regulating valve. By setting the throttle valve 3-2, further throttle control can be performed. Correspondingly, the flow passage 3-12 is communicated with the hollow passage of the rotor after passing through the throttle valve 3-2.

[0025] In this embodiment, the longitudinal section of the valve body of the regulating valve 3-5 is H-shaped. A spring 3-6 and a piston 3-8 are installed at one end thereof, and a throttle valve 3-2 is correspondingly installed at the other end. The outer periphery of one side of the valve body abuts against the inner wall of the housing, and a gap is provided between the outer periphery of the other side of the valve body and the inner wall of the housing to form a flow passage 3-12. During actual installation, the housing and the valve body of the regulating valve are welded and fixed to make them abut against each other. A third flow hole 3-13 is provided at the other end of the valve body, and the gap communicates the first flow hole and the third flow hole.

[0026] In this embodiment, at least one pair of the first flow holes 3-10 is provided. When one pair is provided, one of them is provided at the abutting position between the housing and the valve body, and the other is provided at the gap between the valve body and the housing. This flow passage is communicated with the gap. The second flow passage 3-11 is provided at the lower end of the housing and the valve body corresponding to the spring.

[0027] In this embodiment, the housing includes an upper housing 3-7 and a lower housing 3-4 connected to the upper housing. The piston 3-8 passes through the upper housing 3-7 and is connected to the anti-disengagement head 3-9. The lower end of the lower housing 3-4 is connected to the connector 3-1. The connector 3-1 is connected through a centralizing ring provided in the upper joint.

[0028] As Figure 2 shown, when the fluid flow rate is not sufficient to push the piston 3-8 and the spring 3-6, the first fluid passage hole 3-10 in the upper part of the housing is blocked by the piston 3-8, and the fluid cannot enter. The flow channel is composed of the space between the automatic regulating device 3 and the lower joint 4 and the space flowing to the rotor 2 and the stator 1. As Figure 3 shown, when the fluid flow rate is large enough, a relatively large acting force acts on the anti-disengagement head 3-9, pushing the piston 3-8 to move downward, and then compressing the spring 3-6. Part of the fluid flows in through the first fluid passage hole 3-10 of the housing, enters the throttle valve 3-2 through the fluid passage 3-12, and the throttle valve 3-2 can perform further throttling control. Finally, it enters the inner hole of the rotor 2 through the inner hole of the connecting joint 3-1.

[0029] Through the hollow rotor and the flow rate automatic regulating device of the present invention, it is possible to effectively prevent the screw motor from failing in advance due to excessive flow rate, and increase the service life of the tool.

[0030] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotor hollow shunt automatic adjustment device, comprising a rotor, a stator cooperating with the rotor, and an upper joint connected to one end of the stator, characterized in that: An automatic adjustment device is provided inside the upper connector and is connected to the rotor. The automatic adjustment device includes a housing, a regulating valve installed inside the housing, and a connector connected to the housing, which are connected in sequence from top to bottom. The regulating valve includes a valve body and a piston installed inside the valve body. A spring is connected between the inner end of the piston and the bottom of the valve body. The outer end of the piston is connected to an anti-falling head. A first flow hole and a second flow hole are provided on the housing and the regulating valve. Both the first flow hole and the second flow hole are communicated with the space between the automatic adjustment device and the upper connector. In the initial state, the outer periphery of the piston seals part of the first flow hole. A flow passage is provided between the valve body and the housing and is communicated with the hollow passage of the rotor.

2. The automatic regulating device for rotor hollow shunt according to claim 1, wherein: A throttle valve is provided at the end of the connector close to the regulating valve. The flow passage is communicated with the hollow passage of the rotor after passing through the throttle valve.

3. The automatic regulating device for rotor hollow flow diversion according to claim 1 or 2, characterized in that: The longitudinal section of the valve body of the regulating valve is H-shaped. A spring and a piston are installed at one end, and the other end corresponds to the throttle valve. The outer periphery of one side of the valve body abuts against the inner wall of the housing, and there is a gap between the outer periphery of the other side and the inner wall of the housing. A third flow hole is provided at the other end of the valve body. The gap communicates the first flow hole and the third flow hole.

4. The automatic regulating device for rotor hollow shunt according to claim 3, characterized in that: The second flow passage is provided at the lower end of the housing and the valve body corresponding to the spring.

5. The automatic regulating device for rotor hollow flow splitting according to claim 3, characterized in that: At least one pair of the first flow holes is provided. One is provided at the abutting position of the housing and the valve body, and the other is provided at the gap between the valve body and the housing. The flow passage is communicated with the gap.

6. The automatic regulating device for rotor hollow flow diversion according to claim 3, characterized in that: The housing and the valve body of the regulating valve are fixedly welded.

7. The automatic regulating device for hollow flow diversion of a rotor according to claim 1 or 2, characterized in that: The connector is connected through a centralizing ring provided inside the upper connector.

8. A rotor hollow shunt automatic adjustment device according to claim 1 or 2, characterized in that: The housing includes an upper housing and a lower housing connected to the upper housing. The piston passes through the upper housing and is connected to the anti-falling head. The lower end of the lower housing is connected to the connector.

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