A valve core removal device for a constant flow water distributor

Abstract

This utility model belongs to the field of mechanical equipment technology, and specifically relates to a valve core removal device for a constant flow water distributor. To solve the technical problem that existing removal devices are not labor-saving, this utility model discloses a valve core removal device for a constant flow water distributor, including an expansion rod, an expansion tube, and a support frame. This utility model introduces a support frame into the removal device, and sets an external thread and nut on the outside of the expansion tube to form a screw-nut mechanism. The force-saving nature of the screw-nut mechanism solves the problem of laborious valve core removal.

Description

Technical Field

[0001] This utility model relates to a valve core removal device for a constant flow water distributor, belonging to the field of mechanical equipment technology. Background Technology

[0002] After an oil field is put into development, the formation pressure continuously decreases as oil and gas are extracted, necessitating the replenishment of formation energy. Currently, most oil fields use water injection to replenish formation energy. Water injection is a crucial extraction method in oil field development, serving as an effective way to replenish formation energy and maintain long-term high and stable production. During water injection, it is essential to achieve stable, quantitative, and precise water injection under high pressure to minimize damage to the formation structure. With the development of information technology in oilfield enterprises, constant flow water distributors are widely used in high-pressure water injection wells to achieve stable, quantitative, and precise water injection. The constant flow water distributor consists of four parts: a flow measurement section, an electric regulating valve, a programmable controller, and a fluid pipeline section. In field use, the following problems exist: 1. Because high-pressure water injection in oilfields is achieved using plunger pumps, suspended solids flow through the flow measurement section with the water during injection, causing inaccurate flow measurements. 2. Over long-term use, the valve core is easily damaged by the scouring effect of the water flow, requiring periodic replacement and maintenance. 3. The valve core, immersed in the injection pipeline, is prone to scaling over time, making it difficult to remove during replacement and maintenance. 4. The constant flow water distributor is a precision measuring instrument; to achieve a tight seal, the valve core fits tightly to the valve body, making removal difficult. These problems with the valve core in the flow measurement section significantly impact the quantitative and precise water injection during the water injection development process.

[0003] Chinese utility model patent CN216749325U discloses a novel connector for suspending control rod assemblies, including a locking rod and a locking claw. The locking rod moves within the locking claw by rotating a screw-in nut, and the elastic claw opens via a tapered surface, engaging and locking against the inner wall of the control arm assembly. However, this connector requires a lifting device to hoist the entire structure when lifting the assembly, which is laborious. Furthermore, it is difficult to remove the valve core when dealing with the tightly fitted valve core and valve body structure. Utility Model Content

[0004] The purpose of this utility model is to provide a valve core removal device for a constant flow water distributor, so as to solve the technical problem that the existing removal devices are not labor-saving.

[0005] To achieve the above objectives, this utility model provides a valve core removal device for a constant flow water distributor, including an expansion bolt. The device is characterized by further including a support frame for supporting the constant flow water distributor housing. The support frame includes at least two legs, with a crossbeam perpendicular to the legs between the legs. The crossbeam has a central through hole. The expansion bolt is inserted into the central through hole of the support frame. A nut, threaded onto the outer tube of the expansion bolt, allows the expansion bolt to move axially along the central through hole of the support frame. A space for accommodating the valve core is formed between the legs.

[0006] Furthermore, the expansion bolt includes an expansion rod and an expansion tube; one end of the expansion rod is provided with a tapered surface, and the other end is provided with an external thread of the expansion rod and an expansion rod screw-in nut that mates with the external thread of the expansion rod; one end of the expansion tube is provided with circumferentially distributed claws, and the expansion tube is fitted onto the expansion rod, with the claws corresponding to the tapered surface; the expansion rod screw-in nut is located on the side of the expansion tube away from the claws, and the expansion rod is driven to move inside the expansion tube by rotating the expansion rod screw-in nut.

[0007] Furthermore, the expansion bolt is clearance-fitted with the inner hole of the constant flow water distributor valve core, and the claw is driven to open and engage in the inner hole of the constant flow water distributor valve core by the tapered surface of the expansion rod.

[0008] Furthermore, the claw is an elastic claw.

[0009] Furthermore, the support frame is fitted onto the outside of the expansion tube. The outer end of the expansion tube away from the elastic claw is provided with an external thread and an expansion tube screw-in nut that mates with the external thread. The expansion tube screw-in nut is located on the side of the support frame away from the support foot. By rotating the expansion tube screw-in nut, the expansion tube is driven to move within the support frame.

[0010] Furthermore, the expansion tube has two symmetrical holes for mounting a handle.

[0011] Furthermore, the expansion rod is also provided with an anti-loosening nut, which engages with the external thread of the expansion rod and is located on the side of the expansion rod where the nut is screwed in, away from the expansion tube.

[0012] Furthermore, there are at least three elastic claws, and a slot is provided between two adjacent elastic claws.

[0013] Beneficial effects: This utility model is an improved invention. It has an external thread and nut on the outside of the expansion tube, which together with the support frame form a screw and nut mechanism. When removing the valve core, the nut on the support frame can be clamped by a tool with a long lever arm such as a wrench. Rotating the nut will drive the expansion tube to move relative to the support frame to pull out the valve core, making it easier to remove the valve core. Attached Figure Description

[0014] Figure 1This is an overall schematic diagram of the valve core removal device for the constant flow water distributor of this utility model.

[0015] Figure 2 This is a cross-sectional view of the expansion rod of the valve core removal device for the constant flow water distributor of this utility model;

[0016] Figure 3 This is a cross-sectional view of the expansion tube of the valve core removal device for the constant flow water distributor of this utility model.

[0017] The components are: 1. Expansion rod; 2. Support frame; 3. Expansion tube screwed into nut; 4. Expansion tube; 5. Expansion rod screwed into nut; 6. Handle. Detailed Implementation

[0018] To address the problems in the background technology, the core inventive concept of this utility model is as follows: This utility model introduces a support frame into the extraction device, and sets an external thread and nut on the outside of the expansion tube to form a screw and nut mechanism, which solves the problem of laborious extraction of the valve core by utilizing the labor-saving nature of the screw and nut mechanism.

[0019] The present invention will be further described in detail below with reference to an embodiment of the constant flow water distributor valve core removal device.

[0020] like Figure 1 As shown, the constant flow water distributor valve core removal device of this utility model includes an expansion rod 1, a support frame 2, an expansion tube screwed into a nut 3, an expansion tube 4, an expansion rod screwed into a nut 5, and a handle 6, wherein the expansion rod 1, the expansion tube 4, and the expansion rod screwed into a nut 5 constitute an expansion bolt.

[0021] like Figure 1 and Figure 2 As shown, one end of the expansion rod 1 has a tapered surface, and the other end has an external thread and an expansion rod screw-in nut 5 that mates with the external thread.

[0022] like Figure 3 As shown, the expansion tube 4 is fitted onto the expansion rod 1. One end of the expansion tube 4 has three circumferentially distributed claws. The outer end of the expansion tube 4, away from the claws, has an external thread and an expansion tube screw-in nut 3 that mates with the external thread. The expansion rod screw-in nut 5 is located on one side of the expansion tube 4. By rotating the expansion rod screw-in nut 5, the expansion rod 1 is driven to move inside the expansion tube 4, and the claws are opened by the conical surface. The expansion tube 4 has two symmetrical holes for installing a handle 6. The handle improves the portability of the removal device. The claws correspond to the conical surface, and a slot is provided between two adjacent claws. In this embodiment, the claws are elastic claws. As the conical surface moves away from the elastic claws, the elastic claws can return to their original position, facilitating repeated use.

[0023] The support frame 2 is fitted onto the outside of the expansion tube 4. The support frame 2 includes two legs, and a crossbeam perpendicular to the legs is provided between the legs. A central through hole is opened on the crossbeam, through which the expansion tube 4 passes and is fitted with the hole wall with clearance. A space for accommodating the valve core is formed between the legs and the outer wall of the expansion tube 4. The legs facilitate the support frame 2 to press against the valve body to ensure the stability of the removal device and facilitate the removal of the valve core. The crossbeam provides a force point for screwing the expansion tube into the nut 3. The expansion tube screwing nut 3 is located on one side of the support frame 2. Rotating the expansion tube screwing nut 3 drives the expansion tube 4 to move within the support frame 2.

[0024] The method of using the valve core removal device for the constant flow water distributor of this utility model is as follows:

[0025] First, insert the expansion rod 1 through the inner cavity of the expansion rod 4, and then place both into the inner hole of the valve core. The conical surface of the expansion rod 1 does not enter the elastic claw of the expansion rod 4. At this time, the elastic claw is in a relaxed state, and the removal device can be freely removed. Second, tighten the expansion rod screw nut 5 at the tail of the expansion rod 1. At this time, the expansion rod 1 extends outward relative to the expansion tube 4, and the conical surface enters the inner side of the elastic claw, gradually opening the elastic claw and tightening it against the inner wall of the valve core's inner hole. Finally, tighten the expansion tube screw nut 3 at the tail of the expansion tube 4. At this time, the support leg of the support frame 2 is pressed against the valve body, and the expansion tube 4 extends outward relative to the crossbeam of the support frame 2, pulling the valve core out of the constant flow water distributor.

[0026] In the above embodiments, the support frame 2 includes two legs, and a crossbeam perpendicular to the legs is provided between the legs. A central through hole is opened on the crossbeam, and the expansion tube 4 passes through the central through hole and is in clearance fit with the hole wall. A space for accommodating the valve core is formed between the legs and the outer wall of the expansion tube 4. In other embodiments, the support frame 2 includes a cover bottom with a through hole and a cover wall extending along the periphery of the cover bottom away from the side where the expansion rod is screwed into the nut 5. The expansion tube 4 passes through the through hole on the cover bottom and is in clearance fit with the hole wall. A space for accommodating the valve core is formed between the cover wall and the outer wall of the expansion tube 4. The bottom end of the cover wall abuts against the outer surface of the valve body to form support.

[0027] In the above embodiments, the support frame 2 includes two legs, and a crossbeam perpendicular to the legs is provided between the legs. A central through hole is opened on the crossbeam, and the expansion tube 4 passes through the central through hole and is fitted with the hole wall with a clearance. A space for accommodating the valve core is formed between the legs and the outer wall of the expansion tube 4. In other embodiments, the support frame 2 can also be a sleeve. A space for accommodating the valve core is formed between the inner wall of the sleeve and the outer wall of the expansion tube 4. One end of the sleeve is pressed against the outer surface of the valve body to form support.

[0028] In the above embodiments, the chuck is an elastic chuck; while in other embodiments, the chuck is a rigid chuck, and after the chuck opens under the action of the conical surface, the chuck cannot reset itself even if the conical surface moves away from the chuck.

[0029] In the above embodiment, the number of elastic claws is 3, while in other embodiments, the number of elastic claws can be two, four, five or more.

[0030] In the above embodiments, the support frame 2 includes a cover bottom with a through hole and a cover wall extending along the periphery of the cover bottom toward the side away from the expansion rod screwed into the nut 5. The expansion tube 4 passes through the through hole on the cover bottom and is in clearance fit with the hole wall. A space for accommodating the valve core is formed between the cover wall and the outer wall of the expansion tube 4. In other embodiments, the support frame 2 is a sleeve, and a space for accommodating the valve core is formed between the inner wall of the sleeve and the outer wall of the expansion tube 4.

[0031] In other embodiments, the expansion rod 1 is also provided with an anti-loosening nut, which is engaged with the external thread of the expansion rod and is located on the side of the expansion rod where the nut 5 is screwed in, away from the expansion tube 4.

[0032] Finally, it should be noted that the above are merely preferred embodiments of this utility model and are not intended to limit the utility model. Although the utility model 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 without creative effort, or make equivalent substitutions for some technical features, or organically combine different types of specific implementation methods to create the specific implementation methods shown in the accompanying drawings. Of course, those skilled in the art can also create other specific implementation methods not shown in the accompanying drawings. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A constant flow water distributor valve core extraction device comprising an expansion bolt, characterized in that: It also includes a support frame for supporting the constant flow water distributor housing. The support frame includes at least two legs, and a crossbeam perpendicular to the legs is provided between the legs. A central through hole is opened on the crossbeam. The expansion bolt is inserted into the central through hole of the support frame. A nut that can move the expansion bolt axially along the central through hole of the support frame is threaded onto the outer tube of the expansion bolt. A space for accommodating the valve core is formed between the legs.

2. The constant flow distributor spool removal device of claim 1, wherein: The expansion bolt includes an expansion rod and an expansion tube; one end of the expansion rod has a tapered surface, and the other end has an external thread and an expansion rod screw-in nut that mates with the external thread; one end of the expansion tube has circumferentially distributed claws, and the expansion tube is fitted onto the expansion rod, with the claws corresponding to the tapered surface; the expansion rod screw-in nut is located on the side of the expansion tube away from the claws, and the expansion rod is driven to move inside the expansion tube by rotating the expansion rod screw-in nut.

3. The constant flow distributor spool removal device of claim 2, wherein: The expansion bolt is clearance-fitted with the inner hole of the constant flow water distributor valve core, and the claw is driven to open and engage in the inner hole of the constant flow water distributor valve core by the tapered surface of the expansion rod.

4. The valve core removal device for a constant flow water distributor according to claim 3, characterized in that: The jaws are elastic jaws.

5. The valve core removal device for a constant flow water distributor according to claim 4, characterized in that: The support frame is fitted onto the outside of the expansion tube. The outer end of the expansion tube away from the elastic claw is provided with an external thread and an expansion tube screw-in nut that mates with the external thread. The expansion tube screw-in nut is located on the side of the support frame away from the support foot. By rotating the expansion tube screw-in nut, the expansion tube is driven to move within the support frame.

6. The valve core removal device for a constant flow water distributor according to any one of claims 2 to 5, characterized in that: The expansion tube has two symmetrical holes for mounting a handle.

7. The valve core removal device for a constant flow water distributor according to any one of claims 2 to 5, characterized in that: The expansion rod is also provided with an anti-loosening nut, which is engaged with the external thread of the expansion rod and is located on the side of the expansion rod where the nut is screwed in, away from the expansion tube.

8. The constant flow water distributor valve core removal device according to claim 4 or 5, characterized in that: There are at least three elastic claws, and a slot is provided between two adjacent elastic claws.

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