Oil outlet structure of flowmeter

Abstract

The utility model provides an oil outlet structure of a flow meter, which comprises an end cover connected with the outer side wall of the end part of a flow meter body, the end cover comprises a glass window mounting part and an oil outlet port which are integrally connected, and a step for mounting a glass window is formed between the glass window mounting part and the oil outlet port; a first sealing ring is arranged between the lower end of the flowmeter body and the glass window; a second sealing ring is arranged between the lower end of the glass window and the step; a third sealing ring and a fourth sealing ring are arranged between the upper part and the lower part of the outer side wall of the glass window and the glass window mounting part respectively; according to the end cover of the technical scheme, the oil observation window and the oil outlet port are integrated, and the risk of medium leakage is reduced; and the sealing at the glass is changed into axial sealing from the original radial sealing adopting ring sealing, so that the precision requirement of the radial size of the glass is reduced, and the manufacturing cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of flow meters, in particular to an oil outlet structure of a flow meter. Background Art

[0002] A flow meter is an instrument that indicates the measured flow rate and (or) the total amount of fluid in a selected time interval. The applicant has long been producing products for oil delivery, such as fuel guns, oil pumps, and oil flow meters. When a portable flow meter is working, it is usually observed through the oil outlet end cover (glass) in the oil sight glass, and it can be clearly observed what flow state the flowing medium in the pipeline is in at this time (the flow state of completely filling the pipeline, the flow state of not filling the pipeline, the state of no medium flowing in the pipeline, and the flow state of whether there are bubbles, foreign matter, etc. in the flowing medium in the pipeline). The oil outlet end requires the end user to install a joint that matches the caliber of his own equipment to connect the entire pipeline.

[0003] At present, the oil outlet cover of the flow meter manufactured by the applicant generally consists of four parts (such as Figure 1 , Figure 3 As shown), 1a-O-ring (three locations), 2a-glass, 3a-oil sight glass, 4a-oil outlet port, the oil sight glass and the oil outlet port are threadedly connected; the four joints all need to be sealed, and when one of them is not sealed properly, leakage will occur, causing serious consequences (generally, this product is used in gas stations, oil depots and other places, most of which are flammable and explosive flowing media), and this structure has high requirements on the processing accuracy of the radial dimension of the glass; therefore, the applicant improves the oil outlet structure of the flow meter to facilitate processing while having good sealing properties. Summary of the invention

[0004] The purpose of the utility model is to overcome the shortcomings and deficiencies of the prior art and to provide an oil outlet structure of a flow meter. The technical solution adopted by the utility model is as follows:

[0005] A flow meter oil outlet structure, which is connected to one end of the flow meter body and includes an end cover connected to the outer side wall of the end of the flow meter body, the end cover includes a glass window mounting portion and an oil outlet port that are integrally connected, a step for mounting the glass window is formed between the glass window mounting portion and the oil outlet port; the glass window is located on the inner side of the glass window mounting portion and at the lower end of the flow meter body, a first sealing ring is arranged between the lower end of the flow meter body and the glass window, and a second sealing ring is arranged between the lower end of the glass window and the step; a third sealing ring and a fourth sealing ring are arranged between the upper and lower outer side walls of the glass window and the glass window mounting portion, respectively.

[0006] The above-mentioned “inner side” refers to the side close to the oil flow passage, and the “outer side” refers to the side away from the oil flow passage.

[0007] Preferably, the first sealing ring is respectively attached to the lower end surface of the flow meter body and the upper end surface of the glass window at the top and bottom, and the cross-section of the first sealing ring is rectangular.

[0008] Preferably, the second sealing ring is respectively attached to the lower end face and step of the glass window at the top and bottom, and the cross-section of the second sealing ring is rectangular; a first embedding groove is provided at the step of the end cover, and the second sealing ring is at least partially located in the first embedding groove.

[0009] Preferably, the third sealing ring and the fourth sealing ring are O-rings.

[0010] Preferably, the outer wall of the first sealing ring is at least partially in contact with the inner wall of the glass window mounting portion; a second embedding groove is provided at the lower end of the flow meter body, and the upper end of the first sealing ring is at least partially located in the second embedding groove; the upper end of the glass window mounting portion is stepped with the lower end of the flow meter body.

[0011] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

[0012] The beneficial effects of the utility model are as follows: the end cover integrates the original oil sight glass and the oil outlet port into one, and compared with the version before the improvement, it reduces one threaded connection and one O-ring seal, reducing the risk of medium leakage at two locations; the seal at the glass is changed from the original radial two O-ring seals to two rectangular ring seals on the end face; the control of radial size accuracy in the glass manufacturing process is proportional to the manufacturing cost. After the first and second sealing rings are changed to seal the two axial end faces, the radial size requirements of the glass can be appropriately relaxed, thereby saving manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, without paying creative labor, other drawings obtained based on these drawings still belong to the scope of the utility model.

[0014] Figure 1 This is the schematic diagram of the original flow meter structure of the applicant;

[0015] Figure 2 This is a schematic diagram of the structure of Example 1 obtained by this improvement;

[0016] Figure 3This is the schematic diagram of the oil outlet structure of the original flow meter;

[0017] Figure 4 This is a schematic diagram of the oil outlet structure of Example 1;

[0018] In the figure, 1a-O-ring, 2a-glass, 3a-oil sight glass, 4a-oil outlet port, 5a-flow meter body;

[0019] 1-sealing ring, 11-third sealing ring, 12-fourth sealing ring, 21-first sealing ring, 22-second sealing ring, 3-glass window, 4-end cover, 41-glass window mounting portion, 42-oil outlet port, 43-step, 5-flowmeter body. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0021] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0022] The directions and positions mentioned in the present invention, such as "upper", "lower", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., are only for reference to the directions or positions of the drawings. Therefore, the directions and positions used are used to explain and understand the present invention, but not to limit the scope of protection of the present invention.

[0023] Example 1

[0024] like Figure 2 , Figure 4As shown, an oil outlet structure of a flow meter is connected to one end of a flow meter body 5, and includes an end cover 4 connected to the outer side wall of the end of the flow meter body 5, the end cover 4 includes a glass window mounting portion 41 and an oil outlet port 42 that are integrally connected, and a step 43 for mounting a glass window 3 is formed between the glass window mounting portion 41 and the oil outlet port 42; the glass window 3 is located at the inner side of the glass window mounting portion 41 and the lower end of the flow meter body 5, a first sealing ring 21 is arranged between the lower end of the flow meter body 5 and the glass window 3, and a second sealing ring 22 is arranged between the lower end of the glass window 3 and the step 43; a third sealing ring 11 and a fourth sealing ring 12 are arranged between the upper and lower sides of the outer side wall of the glass window 3 and the glass window mounting portion 41 respectively; the upper and lower sides of the first sealing ring 21 are respectively attached to the lower end surface of the flow meter body 5 and the upper end surface of the glass window 3, and the cross-section of the first sealing ring 21 is rectangular.

[0025] The above-mentioned "inside" refers to the side close to the oil flow channel, and the "outside" refers to the side away from the oil flow channel; the above-mentioned end cover integrates the original oil sight glass and oil outlet port into one. Compared with the version before the improvement, it reduces one threaded connection and one O-ring seal, reducing the risk of medium leakage at two locations; the seal at the glass is changed from the original radial two O-ring seals to two rectangular ring seals on the end face; the control of radial size accuracy in the glass manufacturing process is proportional to the manufacturing cost. After the first and second sealing rings are changed to seal the two axial end faces, the radial size requirements of the glass can be appropriately relaxed, thereby saving manufacturing costs.

[0026] Furthermore, the second sealing ring 22 is respectively attached to the lower end surface of the glass window 3 and the step 43 at the top and bottom, and the cross-section of the second sealing ring 22 is rectangular; a first embedding groove is provided at the step 43 of the end cover 4, and the second sealing ring 22 is at least partially located in the first embedding groove.

[0027] Furthermore, the third sealing ring 11 and the fourth sealing ring 12 are O-rings.

[0028] Furthermore, the outer wall of the first sealing ring 21 is at least partially fitted with the inner wall of the glass window mounting portion 41; a second embedding groove is provided at the lower end of the flow meter body 5, and the upper end of the first sealing ring 21 is at least partially located in the second embedding groove; the upper end of the glass window mounting portion 41 is matched with the lower end of the flow meter body 5 in a stepped manner.

[0029] Reference Figure 4, flanges are extended on both sides of the upper end of the end cover 4, which are fixedly connected to the lower end of the flow meter body 5 through positioning pins or other fasteners, and when connecting, it is necessary to ensure that part of the outer wall of the end of the flow meter body 5 is in contact with the inner wall of the end cover 4; there is also a second step between the flange and the glass window mounting portion 41, and the lower end face of the end of the flow meter body 5 is matched with the upper end face of the second step, so that a part of the lower end face of the end of the flow meter body 5 is axially corresponding to the first sealing ring 21 and the glass window 3, and the other part of the lower end face of the end of the flow meter body 5 is against the upper end face of the second step. The upper surface of the first sealing ring 21 is slightly protruding from the upper end face of the second step during initial assembly, so that it is slightly compressed when it is matched with the lower end of the flow meter body 5, thereby achieving a better sealing effect.

[0030] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. An oil outlet structure of a flow meter, the oil outlet structure being connected to one end of a flow meter body (5), characterized in that: The end cover (4) comprises an end portion connected to an end portion of a flow meter body (5), the end cover (4) comprising an integrally connected glass window mounting portion (41) and an oil outlet port (42), a step (43) for mounting the glass window (3) being formed between the glass window mounting portion (41) and the oil outlet port (42); The glass window (3) is located inside the glass window mounting portion (41) and at the lower end of the flow meter body (5); a first sealing ring (21) is provided between the lower end of the flow meter body (5) and the glass window (3); and a second sealing ring (22) is provided between the lower end of the glass window (3) and the step (43); A third sealing ring (11) and a fourth sealing ring (12) are respectively arranged between the upper and lower sides of the outer side wall of the glass window (3) and the glass window mounting portion (41).

2. The oil outlet structure of a flow meter according to claim 1, characterized in that: The first sealing ring (21) is respectively fitted to the lower end surface of the flow meter body (5) and the upper end surface of the glass window (3) at the top and bottom, and the cross-section of the first sealing ring (21) is rectangular.

3. The oil outlet structure of a flow meter according to claim 1, characterized in that: The second sealing ring (22) is respectively fitted to the lower end surface of the glass window (3) and the step (43) at the top and bottom, and the cross section of the second sealing ring (22) is rectangular.

4. The oil outlet structure of a flow meter according to claim 1, characterized in that: The third sealing ring (11) and the fourth sealing ring (12) are O-rings.

5. The oil outlet structure of a flow meter according to claim 3, characterized in that: A first embedding groove is provided at the step (43) of the end cover (4), and the second sealing ring (22) is at least partially disposed in the first embedding groove.

6. The oil outlet structure of a flow meter according to claim 1 or 2, characterized in that: The outer side wall of the first sealing ring (21) is at least partially in contact with the inner side wall of the glass window mounting portion (41).

7. The oil outlet structure of a flow meter according to claim 6, characterized in that: A second embedding groove is provided at the lower end of the flow meter body (5), and the upper end of the first sealing ring (21) is at least partially located in the second embedding groove.

8. The oil outlet structure of a flow meter according to claim 7, characterized in that: The upper end of the glass window mounting portion (41) is matched with the lower end of the flow meter body (5) in a stepped manner.

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