Tubular part dismounting tool

Abstract

The utility model relates to the technical field of connecting or detaching objects in press fit, in particular to a tubular part detaching tool. A tubular part dismounting tool comprises a supporting frame, a rotating rod used for penetrating through the supporting frame to stretch into a valve element is arranged on the supporting frame, the rotating rod comprises a screwing section and a fishing section, the screwing section is used for being screwed on the supporting frame in a threaded mode, and the fishing section comprises a rod body fixedly connected with the screwing section and an elastic claw sleeve arranged on the rod body in a sleeving mode. A stopping structure used for stopping the upper end of the elastic claw sleeve is arranged on the screwing section, a wedge-caulking boss is arranged at the end of the rod body, the outer diameter of the end of the elastic claw sleeve is larger than that of the end of the rod body, the elastic claw sleeve is used for being matched with the inner diameter of a detached part, and the end of the elastic claw sleeve is located above the end of the rod body before fishing. And during fishing, the rotating rod is screwed to drive the rod body to move upwards, so that the elastic claw sleeve is opened to clamp the inner wall surface of the dismounting piece to take out the dismounting piece.

Description

Technical Field

[0001] The utility model relates to the technical field of objects used for connecting or removing press-fitting, in particular to a disassembly tool for tubular parts. Background Art

[0002] At present, water injection development in oil fields is the main measure to stabilize production. In order to accurately measure the daily water injection volume of the water injection well, an electronic water meter (GLZ high-pressure flow automatic controller) is installed at the wellhead process to adjust the water volume and achieve accurate measurement. It has been widely used in oil fields. An adjusting valve core is installed inside the electronic water meter. By rotating the valve core, the water volume can be adjusted to achieve accurate water injection. However, after a certain period of use, the valve core is affected by the scale and mechanical impurities of the water injection, and it is difficult to rotate and cannot complete the water adjustment operation. The valve core needs to be removed for replacement and cleaning to ensure its normal operation. The valve core is inside the electronic water meter assembly, and the overall structure of the valve core consists of two hollow upper and lower cylinders. The upper cylinder is the force-bearing component of the valve core salvage. The exposed cylindrical circumference of about 5mm and the inner hole are the only two parts that can be salvaged. The structure of the salvaged force-bearing parts is complex, which makes it difficult to remove the regulating valve core during maintenance.

[0003] There are two existing salvage methods: one is to use a rod with a threaded buckle at the lower end to make a buckle in the inner hole of the valve core, and lift the rod to fish out the valve core. This method has a low success rate, and the valve core removed has damaged the sealing surface of the inner hole of the valve core, and the valve core cannot be used after removal; the second method is to grind the circumference of a cylindrical body with an exposed height of about 5mm into a square, rotate it with a pipe clamp, and then use a rod to make a buckle and lift it up to fish out the valve core. The above two methods are labor-intensive. Under normal circumstances, it takes about 3 hours for two people. If the second method is used, it takes about 5 hours; secondly, the salvaged valve core is damaged and cannot be used again, causing losses.

[0004] Therefore, the work of spool retrieval of electronic water meters needs to reduce the intensity of work and improve the efficiency of retrieval, so that the valve core can continue to be used after being removed. For example, the utility model patent with the authorization announcement number CN211073417U discloses a valve core extractor for a high-pressure flow automatic controller, which is provided with a support sleeve (i.e., a support frame), a drawing tube and a core rod. The upper part of the drawing tube is provided with a drawing nut, and the lower end is an expansion body with a longitudinal groove. The lower part of the core rod is a conical body, and the upper part is provided with a core rod tightening nut. The conical body at the lower part of the core rod cooperates with the expansion body at the lower end of the drawing tube. The core rod is inserted into the drawing tube, and the drawing tube is installed in the center hole of the support sleeve. By rotating the core rod tightening nut, the core rod is moved upward, the expansion body at the lower part of the drawing tube is expanded, and the cavity self-locking is realized in the valve sleeve of the high-pressure flow automatic controller, so that the valve sleeve together with the valve core can be removed from the pressure reducing cavity of the automatic controller.

[0005] However, the pulling tube of the valve core extractor of the above-mentioned high-pressure flow automatic controller is fixedly installed in the center hole of the support sleeve and is not convenient for disassembly. When the valve core needs to be disassembled after being taken out, it is necessary to keep the pulling nut fixed and then screw the core rod tightening nut to drive the core rod downward to shrink the expansion body. Since the expansion body and the valve core are in expansion fit, the operation is laborious and complicated. Utility Model Content

[0006] The utility model aims to provide a tubular parts disassembly tool, which is used to solve the problem that the existing high-pressure flow automatic control instrument valve core extractor needs to be disassembled after the valve core is taken out, and the operation is laborious and complicated.

[0007] The tubular parts disassembly tool of the utility model adopts the following technical scheme: a tubular parts disassembly tool comprises a support frame, a rotating rod for passing through the support frame and extending into the valve core is arranged on the support frame, the rotating rod comprises a screwing section and a salvage section, the screwing section is used to be screwed on the support frame, the salvage section comprises a rod body fixedly connected to the screwing section and an elastic claw sleeve sleeved on the rod body, the screwing section is provided with a stopping structure for stopping the upper end of the elastic claw sleeve, the end of the rod body has a wedging boss, the outer diameter of the end of the elastic claw sleeve is larger than the outer diameter of the end of the rod body and is used to match the inner diameter of the disassembled part, the end of the elastic claw sleeve is above the end of the rod body before salvaging, and the rod body is driven to move upward by screwing the rotating rod during salvaging so that the elastic claw sleeve opens and clamps the inner wall surface of the disassembled part to bring it out.

[0008] Furthermore, the twisting section and the salvaging section are detachably connected.

[0009] Furthermore, the screwing section and the salvaging section are detachably connected via a threaded connection.

[0010] Furthermore, the diameter of the screwing section is greater than the diameter of the salvaging section, and the end surface of the screwing section constitutes a stopping structure.

[0011] Furthermore, the elastic claw sleeve comprises a sleeve body and split grooves uniformly arranged on the sleeve body in a circumferential direction, and elastic claws are formed between adjacent split grooves.

[0012] Furthermore, a reinforcing boss is provided at the end of the elastic claw.

[0013] Furthermore, a screwing portion is provided on the screwing section.

[0014] Furthermore, the cross-sectional shape of the screwing portion is a square.

[0015] Furthermore, the support frame is a cylindrical structure with an opening facing downward.

[0016] The tubular parts disassembly tool of the utility model improves the existing tubular parts disassembly tool. The beneficial effects of the tubular parts disassembly tool of the utility model are as follows: when in use, for example, when disassembling the horizontal regulating valve core, the support frame is first pressed against the water meter assembly, and the rotating rod passes through the support frame and extends into the valve core. When extending into the inner hole of the valve core, since the elastic claw sleeve matches the inner diameter of the valve core, the elastic claw sleeve slides upward under the action of the valve core but is stopped by the stopping structure of the twisting section and cooperates with the valve core. Then, when the twisting section of the rotating rod is twisted for salvage, the rotating rod drives the rod The rod body moves up. Since the elastic claw sleeve matches and fits the inner diameter of the valve core, the end of the elastic claw and the valve core remain in a relatively fixed state when the rod body moves up, and are expanded by the wedging boss at the end of the rod body, thereby clamping the valve core to bring it out. Since the elastic claw sleeve is sleeved on the rod body, after the valve core is salvaged, the valve core is pushed to drive the end of the elastic claw sleeve to separate from the end of the rod body, so that the clamping state between the valve core and the elastic claw is invalidated, and then the elastic claw sleeve and the valve core can be pulled in opposite directions to separate the valve core from the tubular parts disassembly tool, which is very convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the tubular parts disassembly tool of the utility model.

[0018] In the figure: 1, screwing section; 2, support frame; 3, rod body; 4, elastic claw sleeve; 5, wedging boss; 6, strengthening boss; 7, splitting groove; 8, sleeve body; 9, screwing part. DETAILED DESCRIPTION

[0019] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0020] First, the technical solution of the utility model is generally described as follows:

[0021] The utility model is based on the existing high-pressure flow automatic control instrument valve core extractor, in which a pulling tube is installed in the center hole of the support sleeve and is fixedly installed, so it is not easy to disassemble. After the valve core is taken out by the expansion body, the valve core needs to be disassembled and reused, and a core rod tightening nut is adopted. However, since the expansion body and the valve core are tightly matched, the tightening force is relatively large. When the core rod tightening nut is screwed to drive the core rod to move downward, the large tightening force requires the operator to exert force, and tools are also required, making the operation more complicated.

[0022] Based on the above problems, the utility model designs a tubular parts disassembly tool to facilitate the disassembly operation of the valve core, and conceives how to facilitate the disassembly of the valve core after the valve core is salvaged, and specifically adopts the following technical scheme: the tubular parts disassembly tool of the utility model includes a support frame, the support frame is used to be tightly pressed against the water meter assembly, and a rotating rod is provided on the support frame for passing through the support frame and extending into the valve core, the rotating rod includes a screwing section and a salvaging section, the screwing section is used to be screwed on the support frame, and the salvaging section includes a rod body and an elastic claw sleeve, the rod body is fixedly connected to the screwing section, the elastic claw sleeve is sleeved on the rod body, and a stopping structure is provided on the screwing section for stopping the upper end of the elastic claw sleeve, the outer diameter of the end portion of the elastic claw sleeve is larger than the outer diameter of the end portion of the rod body and is used to match the inner diameter of the disassembled part, when extending into the inner hole of the valve core, due to the outer diameter of the elastic claw sleeve and the inner diameter of the valve core The elastic claw sleeve is matched with the valve core, and the elastic claw sleeve slides upward under the action of the valve core but is stopped by the stopping structure of the screwing section and cooperates with the valve core. The end of the rod body is provided with a wedging boss for propping up the elastic claw sleeve, so that when the rod body moves upward, the end of the elastic claw sleeve and the valve core remain in a relatively fixed state, thereby being expanded by the wedging boss at the end of the rod body. The end of the elastic claw sleeve is above the end of the rod body before salvaging. During salvaging, the rod body is driven to move upward by screwing the rotating rod so that the end of the elastic claw is expanded at the end periphery of the rod body, thereby clamping the valve core to bring it out. Since the elastic claw sleeve is sleeved on the rod body, after the valve core is salvaged, the valve core is pushed to drive the end of the elastic claw sleeve to separate from the end of the rod body, so that the clamping state between the valve core and the elastic claw sleeve is invalidated, and then the elastic claw sleeve and the valve core are pulled in opposite directions to separate the valve core from the tubular parts disassembly tool, which is very convenient to operate.

[0023] Specific embodiment of the tubular parts disassembly tool of the utility model:

[0024] This embodiment is described by taking the disassembly of the valve core of the high-pressure flow automatic controller as an example. In other implementations, it can also be used in the occasions of disassembly of other tubular parts installed in the housing.

[0025] The structural schematic diagram of the tubular parts disassembly tool of the utility model is as follows Figure 1As shown, a tubular parts disassembly tool comprises a support frame 2, on which a rotating rod is provided for passing through the support frame 2 and extending into the valve core, the support frame 2 is used to press against the water meter assembly to provide a supporting force for the rotating rod when it is screwed, the rotating rod comprises a screwing section 1 and a salvaging section, a connected threaded hole is provided on the upper end surface of the support frame 2, the screwing section 1 comprises an external thread, the screwing section 1 is screwed on the threaded hole of the support frame 2, the salvaging section comprises a rod body 3 fixedly connected to the screwing section 1 and an elastic claw sleeve 4 sleeved on the rod body 3, the screwing section 1 is provided with a tool for screwing the upper end of the elastic claw sleeve 4 The stopping structure has a wedging boss 5 at the end of the rod body 3, and the outer diameter of the end of the elastic claw sleeve 4 is larger than the outer diameter of the end of the rod body 3 and is used to match the inner diameter of the disassembled part. The end of the elastic claw sleeve 4 is above the end of the rod body 3 before salvaging. During salvaging, the rod body 3 is driven upward by screwing the rotating rod so that the elastic claw sleeve 4 opens the inner wall surface of the clamped disassembly part to bring it out. After the valve core is salvaged, the valve core is pushed to drive the end of the elastic claw sleeve 4 to separate from the end of the rod body 3, so that the clamping state between the valve core and the elastic claw sleeve 4 becomes invalid, and the valve core is separated from the tubular parts disassembly tool.

[0026] The screwing section 1 and the salvage section can be an integrated structure. When the screwing section 1 and the salvage section are an integrated structure, the diameters of the screwing section 1 and the salvage section need to be the same to ensure that the elastic claw sleeve 4 can be sleeved on the salvage section. However, the elastic claw sleeve 4 is often expanded and contracted during long-term use, so it is easy to be damaged and needs to be replaced. In order to facilitate the removal of the elastic claw sleeve 4, in this embodiment, the screwing section 1 and the salvage section are preferably detachably connected. Specifically, the screwing section 1 is provided with a threaded hole, and the salvage section is provided with an external thread. The salvage section is screwed into the threaded hole of the screwing section 1 to achieve a detachable connection. When the elastic claw sleeve 4 needs to be removed, the screwing section 1 and the salvage section can be removed. Since the elastic claw sleeve 4 is sleeved on the salvage section, the elastic claw sleeve 4 can be pulled to separate from the rod body 3 to be removed, which is convenient to operate. Of course, in other embodiments, the screwing section 1 and the salvage section can also be sleeved with each other, and the screwing section 1 and the salvage section can be detachably connected by a pin shaft passing through the screwing section 1 and the salvage section at the same time.

[0027] When the specific blocking structure is designed, since the salvage section is inserted into the threaded hole of the screwing section 1, the diameter of the screwing section 1 is larger than the diameter of the salvage section, and the end face of the screwing section 1 can form a blocking structure. When the elastic claw sleeve 4 is sleeved on the rod body 3, the elastic claw sleeve 4 can be pushed upward to be blocked by the end face of the screwing section 1. The structure is simple, the structure of the screwing section itself is utilized, and the structure is compact and easy to use. Of course, in other embodiments, when the diameters of the screwing section 1 and the salvage section are not much different, a latch can also be installed on the salvage section to achieve a blocking effect on the elastic claw sleeve 4.

[0028] In this embodiment, in order to achieve the locking effect between the elastic claw sleeve 4 and the valve core, preferably, the elastic claw sleeve 4 includes a sleeve body 8 and split grooves 7 evenly arranged circumferentially on the sleeve body 8, and elastic claws are formed between adjacent split grooves 7. The elastic claws are easy to open and cooperate with the valve core to press tightly, and in this way, the elastic claws and the valve core have multiple fitting parts, so that the elastic claws and the inside of the valve core have a better pressing effect.

[0029] Furthermore, in order to make the valve core evenly stressed and ensure a better salvage effect, a reinforcing boss 6 is provided at the end of the elastic claw, so that the reinforcing boss 6 is tightly fitted with the valve core, so that the contact friction between the elastic claw and the valve core is greater, ensuring a better tightening effect and preventing the valve core from detaching from the salvage tool.

[0030] Since the screwing section 1 is provided with external threads, if the external threads are screwed directly during screwing, the threads will be damaged. Preferably, the screwing section 1 is provided with a screwing portion 9, which is more convenient and labor-saving to operate, and will not damage the external threads of the screwing section 1. Specifically, in order to facilitate the operation of personnel, the cross-section shape of the screwing portion 9 is a square, which is more convenient and labor-saving to screw, and has better friction.

[0031] Specifically, in order to achieve a good supporting effect and facilitate good cooperation between the rotating rod and the supporting frame 2, in this embodiment, the supporting frame 2 is a cylindrical structure with an opening facing downward. Of course, in other embodiments, the supporting frame 2 includes an upper end surface for the screwing section 1 to pass through and screw-fit, and a supporting portion for pressing against the water meter assembly is provided with a circumferentially evenly arranged leg structure, which can also ensure a good supporting effect.

[0032] Through the above description of the specific embodiment of the tubular parts disassembly tool of the utility model, it can be seen that the tubular parts disassembly tool of the utility model, when in use, firstly press the support frame 2 against the water meter assembly, and the rotating rod passes through the support frame 2 and extends into the valve core. Since the salvaging section of the rotating rod includes a rod body 3 fixedly connected to the screwing section 1 and an elastic claw sleeve 4 sleeved on the rod body 3, the end of the rod body 3 has a wedging boss 5, and the end of the elastic claw sleeve 4 has a reinforcing boss 6. The outer diameter of the reinforcing boss 6 is larger than the wedging boss 5. The reinforcing boss 6 matches the inner diameter of the valve core before salvaging, and the reinforcing boss 6 is above the wedging boss 5. When extending into the inner hole of the valve core, due to the reinforcing boss 6 Matching the inner diameter of the valve core, the elastic claw sleeve 4 slides upward under the action of the valve core but is stopped by the end face of the screwing section 1. Then, when the screwing section 1 of the rotating rod is screwed for salvage, the rotating rod drives the rod body 3 to move upward. Since the elastic claw sleeve 4 matches and fits the inner diameter of the valve core, the end of the elastic claw and the valve core remain in a relatively fixed state when the rod body 3 moves upward, and are thus stretched open by the wedging boss 5, thereby clamping the valve core to bring it out. Since the elastic claw sleeve 4 is sleeved on the rod body 3, after the valve core is salvaged, the valve core is pushed to drive the reinforcing boss 6 to disengage from the wedging boss 5, so that the clamping state between the valve core and the elastic claw becomes invalid, and the valve core can be separated from the tubular parts disassembly tool, which is very convenient to operate.

[0033] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A tubular parts disassembly tool, comprising a support frame, on which a rotating rod is provided for passing through the support frame and extending into a valve core, wherein: The rotating rod includes a screwing section and a salvage section. The screwing section is used to be threadedly screwed on the support frame. The salvage section includes a rod body fixedly connected to the screwing section and an elastic claw sleeve sleeved on the rod body. The screwing section is provided with a stopping structure for stopping the upper end of the elastic claw sleeve. The end of the rod body is provided with a wedging boss. The outer diameter of the end of the elastic claw sleeve is larger than the outer diameter of the end of the rod body and is used to match the inner diameter of the disassembled part. The end of the elastic claw sleeve is above the end of the rod body before salvaging. During salvaging, the rod body is driven upward by screwing the rotating rod so that the elastic claw sleeve opens and clamps the inner wall surface of the disassembled part to bring it out.

2. The tubular parts removal tool according to claim 1, characterized in that: The twisting section and the salvaging section are detachably connected.

3. The tubular parts removal tool according to claim 2, characterized in that: The screwing section and the fishing section are detachably connected via threaded connection.

4. The tubular parts removal tool according to claim 2, characterized in that: The diameter of the screwing section is greater than the diameter of the salvaging section, and the end surface of the screwing section forms a stopping structure.

5. The tubular parts removal tool according to claim 1, characterized in that: The elastic claw sleeve comprises a sleeve body and split grooves uniformly arranged on the sleeve body in a circumferential direction, and elastic claws are formed between adjacent split grooves.

6. The tubular parts removal tool according to claim 5, characterized in that: The end of the elastic claw is provided with a reinforcing boss.

7. The tubular parts removal tool according to any one of claims 1 to 6, characterized in that: The screwing section is provided with a screwing portion.

8. The tubular parts removal tool according to claim 7, characterized in that: The cross-sectional shape of the screwing portion is a square.

9. The tubular parts removal tool according to any one of claims 1 to 6, characterized in that: The support frame is a cylindrical structure with an opening facing downward.

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