Pore plate clamping device

Abstract

The utility model relates to the technical field of pore plates or nozzles, in particular to a pore plate clamping device. The axial butt joint faces of the front clamping ring and the rear clamping ring are respectively provided with a concave clamping groove and a clamping block capable of being placed in the clamping groove, so that the front clamping ring and the rear clamping ring are detachably and fixedly connected, and the axial butt joint faces of the front clamping ring and the rear clamping ring keep stable sealing contact under the pressure action of the clamping block and the clamping groove. Compared with the prior art, the clamping block and the clamping groove are detachably and fixedly connected, when maintenance and replacement are needed, a damaged device can be independently replaced, and cost is saved; and the clamping blocks are arranged in the clamping grooves, so that the stress area is increased, the structure is simple and stable, and the durability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of orifice plates or nozzles, in particular to an orifice plate clamping device. Background Art

[0002] At present, in high-sulfur gas fields, the natural gas metering of a single well adopts an advanced valve-type orifice throttling device. The orifice is clamped by two clamps and installed vertically on the horizontal airflow channel. The clamp plays the role of fixing the orifice and sealing the outer diameter of the orifice. For example, the Chinese invention patent with the application publication date of May 2018 and the application publication number CN108027261A discloses an orifice assembly, which is assembled by arranging the orifice between two compression rings and then connecting the two compression rings together via a snap. When the orifice valve is running for a long time or cleaned regularly, the snap assembly is easily damaged and falls off the lifting shaft gear, causing the orifice valve to cause damage to the lifting shaft gear when inspecting and repairing the lifting orifice.

[0003] The Chinese utility model patent with the authorization announcement date of January 2022 and the authorization announcement number CN215639599U discloses an integrated orifice plate throttling device, including a front clamping ring and a rear clamping ring, wherein the axial butt joint surfaces of the front clamping ring and the rear clamping ring are respectively provided with a semi-ring groove for clamping the orifice plate, and the orifice plate is inserted in the two semi-ring grooves, and the axial butt joint surfaces of the front clamping ring and the rear clamping ring are connected by welding. The butt joint surfaces of the front and rear clamping rings are connected by welding, which ensures the reliable fixation and sealing of the orifice plate, but at the same time, there are also problems such as complicated operation, non-removable and high maintenance and replacement costs. Utility Model Content

[0004] The utility model aims to provide a hole plate clamping device to solve the technical problems of the prior art that the device is fixed by welding, which is complicated to operate, cannot be disassembled and has high maintenance and replacement costs.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hole plate clamping device comprises a front clamping ring and a rear clamping ring which are arranged opposite to each other, and an annular groove is respectively arranged on the inner side of the axial butt joint surfaces of the front and rear clamping rings, and the two annular grooves are arranged opposite to each other and jointly form an annular cavity for clamping the hole plate, one of the axial butt joint surfaces of the front and rear clamping rings is provided with an inwardly concave groove, and the other is provided with a clamping block which can be placed in the groove and seals the front and rear clamping rings, and the clamping block and the groove are detachably connected; at least two pairs of the clamping block and the groove are provided.

[0007] Preferably, the clamping block is a dovetail slider; and the clamping slot includes a guide slot and a dovetail clamping slot.

[0008] Preferably, the dovetail slot gradually narrows in the travel direction of the dovetail slider.

[0009] Preferably, the card block is an I-shaped card block; and the card slot includes a guide slot and an I-shaped card slot.

[0010] Preferably, at least four pairs of card blocks and card slots are provided.

[0011] Preferably, the clamping blocks and the clamping grooves are evenly arranged in the circumferential direction of the axial butt joint surfaces of the front and rear clamping rings.

[0012] Preferably, the front and rear clamping rings are integrally formed of polytetrafluoroethylene.

[0013] The beneficial effect is that the utility model has improved the existing technology, and the detachable fixed connection of the front and rear supporting rings is realized by respectively providing a concave card groove and a card block that can be placed inside the card groove on the axial docking surfaces of the front and rear clamping rings, and the axial docking surfaces of the front and rear clamping rings maintain stable sealing contact under the pressure of the card block and the card groove. Compared with the existing technology, the card block and the card groove in the utility model are detachably fixedly connected, and when maintenance and replacement are required, the damaged components can be replaced separately, saving costs; and the card block is placed inside the card groove, which increases the force-bearing area, and its structure is simple and stable, and has good durability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the front and rear clamping rings in an embodiment of the utility model;

[0015] Figure 2 It is a schematic diagram of the corresponding structure of the clamping block and the guide groove in the embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the corresponding structures of the clamping block and the dovetail clamping slot in the embodiment of the utility model.

[0017] In the figure: 1, orifice plate clamping device; 11, front clamping ring; 12, rear clamping ring; 2, mounting groove; 3, dovetail slider; 4, guide groove; 5, dovetail slot; a, large diameter end; b, small diameter end. DETAILED DESCRIPTION

[0018] In view of the problems of complicated operation and high replacement and maintenance costs caused by the non-detachable components in the prior art of sealing and fixing the front and rear clamping rings by welding, the utility model realizes the detachable fixed connection of the front and rear holding rings by respectively providing concave card grooves and card blocks that can be placed inside the card grooves on the axial docking surfaces of the front and rear clamping rings. The axial docking surfaces of the front and rear clamping rings maintain stable sealing contact under the pressure of the card blocks and the card grooves. Compared with the prior art, the card blocks and card grooves in the utility model are detachably fixedly connected. When maintenance and replacement are required, damaged components can be replaced separately, saving costs; and the card blocks are placed inside the card grooves, which increases the force-bearing area. The structure is simple and stable, and the durability is good.

[0019] Preferably, the clamping block is a dovetail slider; and the clamping slot includes a guide slot and a dovetail clamping slot.

[0020] Preferably, the dovetail slot gradually narrows in the travel direction of the dovetail slider.

[0021] Preferably, the front and rear clamping rings are integrally formed of polytetrafluoroethylene.

[0022] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0023] like Figure 1 As shown, the orifice plate clamping device 1 includes a front clamping ring 11 and a rear clamping ring 12, the two clamping rings are arranged opposite to each other and have axial butt joint surfaces, annular grooves are respectively arranged inside the axial butt joint surfaces of the front and rear clamping rings, the two annular grooves are arranged opposite to each other and jointly form an annular cavity for clamping the orifice plate. Corresponding mounting grooves 2 are evenly opened on the outer circumferences of the front and rear clamping rings.

[0024] like Figure 2 As shown, a dovetail block, i.e., a dovetail slider 3, is convexly provided on the axial docking surface of the front clamping ring 11, and a corresponding slot for accommodating and locking the dovetail slider 3 is provided on the axial docking surface of the rear clamping ring 12. Specifically, the slot includes a square guide slot 4 for axial insertion of the dovetail slider 3 and a dovetail slot 5 for locking with the dovetail slider 3. The dovetail slider is subjected to force on a conical surface, so the force is more uniform, not easily damaged, and has better durability.

[0025] The blocks and slots are arranged in pairs on the axial butt joint surfaces of the front and rear clamping rings. To ensure the structural stability of the orifice plate clamping device 1 during gas impact, the paired blocks and slots are evenly arranged in the circumferential direction of the axial butt joint surfaces, and their number is determined according to the actual size of the orifice plate clamping device 1. In this embodiment, there are 4 pairs of blocks and slots.

[0026] In order to facilitate the smooth sliding of the dovetail slider, the dovetail slot 5 is gradually narrowed in the direction of travel of the dovetail slider, referring to Figure 2 The end a of the dovetail slot 5 is the large diameter end, and the end b is the small diameter end. When in use, first put the orifice plate into the annular cavity formed by the annular grooves on the two clamping rings, and then rotate the front clamping ring 11 to Figure 2 After the position is shown, place the dovetail slider 3 downward into the square guide groove 4, and then rotate the front clamping ring 1 clockwise to Figure 3 At this time, the mounting grooves 2 on the front clamping ring 11 and the rear clamping ring 12 correspond to each other, and the orifice plate clamping device 1 is assembled on the horizontal airflow duct through the mounting grooves 2. When cleaning and maintenance are required, the orifice plate clamping device 1 is taken out, and it can be easily disassembled by rotating the front clamping ring counterclockwise.

[0027] In other embodiments, the dovetail slot 5 may not be provided with a large diameter end and a small diameter end, but only a chamfer may be provided at the front end of the dovetail slot to facilitate the sliding in of the dovetail slider 3 .

[0028] In other embodiments, the block protruding on the axial docking surface of the front clamping ring may not be a dovetail type, but an I-shaped block may be adopted, and the corresponding rear clamping ring is provided with a square groove for the I-shaped block to be placed and guided, and one side of the square groove is provided with an I-shaped groove that cooperates with the I-shaped block stopper.

Claims

1. A hole plate clamping device, comprising a front clamping ring and a rear clamping ring arranged opposite to each other, wherein the inner sides of the axial butt joint surfaces of the front and rear clamping rings are respectively provided with an annular groove, the two annular grooves are arranged opposite to each other and jointly form an annular cavity for clamping the hole plate, characterized in that: One of the axial butt joint surfaces of the front and rear clamping rings is provided with a concave groove, and the other is provided with a clamping block which can be placed in the groove and seal the front and rear clamping rings, and the clamping block and the groove are detachably connected; at least two pairs of the clamping block and the groove are provided.

2. The orifice plate clamping device according to claim 1, characterized in that: The clamping block is a dovetail slider; the clamping slot includes a guide slot and a dovetail clamping slot.

3. The orifice plate clamping device according to claim 2, characterized in that: The dovetail groove gradually narrows in the travel direction of the dovetail slider.

4. The orifice plate clamping device according to claim 1, characterized in that: The card block is an I-shaped card block; the card slot includes a guide slot and an I-shaped card slot.

5. The orifice plate clamping device according to any one of claims 1 to 4, characterized in that: At least four pairs of card blocks and card slots are provided.

6. The orifice plate clamping device according to any one of claims 1 to 4, characterized in that: The clamping blocks and the clamping grooves are evenly arranged in the circumferential direction of the axial butt joint surfaces of the front and rear clamping rings.

7. The orifice plate clamping device according to any one of claims 1 to 4, characterized in that: The front and rear clamping rings are integrally formed of polytetrafluoroethylene.

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