Mechanical control device for lowest liquid level valve

Abstract

The utility model discloses a lowest liquid level valve mechanical control device which comprises a valve body, a valve seat is fixedly connected in the valve body, a valve cover is fixedly connected to the top of the valve body, a cylinder body is fixedly connected to the top of the valve cover, a cylinder cover is fixedly connected to the top of the cylinder body, and a split ring is arranged in the cylinder body. The middle of the split ring is fixedly connected with a piston, the top of the split ring and the top of the piston are jointly provided with a pressing plate, the bottom of the piston is fixedly connected with a valve rod, and the outer portion of the valve body is fixedly connected with a filtering flange cover. According to the single-control two-position three-way valve, the threaded hole is formed in the outer side of the cylinder body and connected with the pipeline, and the corresponding ball valve is installed on the pipeline, so that the valve cannot operate normally even under the condition that the single-control two-position three-way valve is powered off or deflated. The two-way control function of the valve can be achieved by operating a ball valve on the pipeline and manually operating opening and closing of the valve, the use aging performance of the valve is improved, the production efficiency is improved, the valve adapts to different environments, and the continuity in the production process is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to lowest liquid level valve technical field, concretely is lowest liquid level valve mechanical control device. BACKGROUND

[0002] The lowest liquid level valve mechanical control device is composed of a valve body, a valve seat, a valve rod, a valve cover, a piston, a split ring, a pressing plate, a cylinder body, a cylinder cover, a pneumatic control part and the like. The piston is installed in the cylinder body, and the piston is connected with the valve rod to move up and down. The sealing surface of the valve rod and the sealing surface of the valve seat are in contact to realize sealing. The opening and closing of the valve can be indirectly and automatically controlled through a single-control two-position three-way valve.

[0003] The conventional lowest liquid level valve device is controlled on one side. Once the pneumatic control part of the valve fails, the valve cannot work normally, and the production needs to be stopped for inspection, which increases the cost and affects the production efficiency.

[0004] Therefore, the lowest liquid level valve mechanical control device is designed. CONTENT OF THE UTILITY MODEL

[0005] This part aims to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part and the abstract of the specification and the utility model name to avoid obscuring the purpose of this part, the abstract of the specification and the utility model name. Such simplifications or omissions cannot be used to limit the scope of the utility model.

[0006] To solve the above technical problems, according to one aspect of the utility model, the utility model provides the following technical scheme:

[0007] The lowest liquid level valve mechanical control device comprises a valve body, a valve seat fixedly connected inside the valve body, a valve cover fixedly connected to the top of the valve body, a cylinder body fixedly connected to the top of the valve cover, a cylinder cover fixedly connected to the top of the cylinder body, a split ring arranged inside the cylinder body, a piston fixedly connected to the middle of the split ring, a pressing plate arranged on the top of the split ring and the piston, and a valve rod fixedly connected to the bottom of the piston.

[0008] A filter flange cover is fixedly connected to the outside of the valve body, a right-angle welded connecting pipe is fixedly connected to the outside of the filter flange cover, a steel pipe is fixedly connected to the top end of the right-angle welded connecting pipe, and a first ball valve is fixedly connected to the middle of the steel pipe.

[0009] A pipe joint is fixedly connected to the outside of the cylinder body, a three-way pipe is fixedly connected to the outside of the pipe joint, a second ball valve and a third ball valve are arranged in two pipelines at the outer end of the three-way pipe, a single-control two-position three-way valve corresponding to the second ball valve and the third ball valve is arranged on the top of the second ball valve and the third ball valve, and an electromagnetic valve two-piece is arranged on the outside of the cylinder body.

[0010] As a preferred scheme of the lowest liquid level valve mechanical control device, the electromagnetic valve two joint parts are externally provided with an electromagnetic valve protective cover, so that the external protection of the related electric control can be facilitated.

[0011] As a preferred scheme of the lowest liquid level valve mechanical control device, the welding type end straight pipe joint is connected with the pipeline corresponding to the second ball valve, so that the high-pressure water at the pump end can pass through the first ball valve and the second ball valve to reach the lower cavity of the water cylinder.

[0012] As a preferred scheme of the lowest liquid level valve mechanical control device, the bottom end of the valve rod corresponds to the position of the valve seat, and the sealing surface of the valve rod and the sealing surface of the valve seat are in contact to realize sealing.

[0013] Compared with the prior art, the lowest liquid level valve mechanical control device has the beneficial effects that:

[0014] The cylinder body is externally provided with a threaded hole connected with a pipeline, and a corresponding ball valve is installed on the pipeline, so that even in the case that the single control two-position three-way valve loses power or loses gas, the valve cannot normally operate. The opening and closing of the valve can also be manually operated by operating the ball valve on the pipeline, so that the bidirectional control function of the valve is realized, the time efficiency of the valve is increased, the production efficiency is improved, different environments are adapted, and the continuity in the production process is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the utility model will be described in detail below in combination with the drawings and detailed embodiments. Obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor. Wherein:

[0016] Figure 1 It is the valve body internal structure schematic view of the lowest liquid level valve mechanical control device of the utility model;

[0017] Figure 2 It is the ball valve connection schematic view of the lowest liquid level valve mechanical control device of the utility model;

[0018] Figure 3 It is Figure 1 The structure schematic view of A in the middle.

[0019] Legend: 1, valve body; 2, valve seat; 3, valve cover; 4, cylinder body; 5, cylinder cover; 6, split ring; 7, piston; 8, pressure plate; 9, valve stem; 10, pipe joint; 11, three-way pipe; 12, No. 2 ball valve; 13, No. 3 ball valve; 14, single control two-position three-way valve; 15, electromagnetic valve two-piece; 16, electromagnetic valve protective cover; 17, filter flange cover; 18, right-angle welded connecting pipe; 19, steel pipe; 20, No. 1 ball valve; 21, welded end straight pipe joint. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned purposes, features and advantages of the utility model more apparent, clear and understandable, the specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0021] Secondly, the utility model is described in detail in combination with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the utility model herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0022] In order to make the purposes, technical solutions and advantages of the utility model more clear, the embodiments of the utility model will be described in further detail below with reference to the drawings.

[0023] Please refer to Figures 1-3 The utility model provides minimum liquid level valve mechanical control device, including valve body 1, valve body 1 inside fixedly connected with valve seat 2, valve body 1 top fixedly connected with valve cover 3, valve cover 3 top fixedly connected with cylinder body 4, cylinder body 4 top fixedly connected with cylinder cover 5, cylinder body 4 inside is provided with split ring 6, split ring 6 middle part fixedly connected with piston 7, split ring 6 and piston 7 top jointly provided with pressure plate 8, piston 7 bottom fixedly connected with valve stem 9.

[0024] Among them, the bottom end of valve stem 9 corresponds to the position of valve seat 2, and the sealing surface of valve stem 9 and the sealing surface of valve seat 2 are in contact, which facilitates the sealing of valve body 1.

[0025] Valve body 1 outside fixedly connected with filter flange cover 17, filter flange cover 17 outside fixedly connected with right-angle welded connecting pipe 18, right-angle welded connecting pipe 18 top end fixedly connected with steel pipe 19, steel pipe 19 middle part fixedly connected with No. 1 ball valve 20.

[0026] Among them, No. 1 ball valve 20 top is provided with welded end straight pipe joint 21, and welded end straight pipe joint 21 is connected with the corresponding pipeline of No. 2 ball valve 12, which facilitates the high-pressure water at the pump end to pass through No. 1 ball valve 20 and No. 2 ball valve 12 to reach the lower cavity of the water cylinder.

[0027] The cylinder body 4 is externally fixedly connected with a pipe joint 10, the pipe joint 10 is externally fixedly connected with a tee pipe 11, two pipelines in the outer end of the tee pipe 11 are respectively provided with a second ball valve 12 and a third ball valve 13, the second ball valve 12 and the third ball valve 13 are provided with a single control two-position three-way valve 14 corresponding thereto at the top, and the cylinder body 4 is externally provided with a solenoid valve two-piece 15.

[0028] In the embodiment, the solenoid valve two-piece 15 is externally provided with a solenoid valve protective cover 16, so as to facilitate external protection of the related electric control.

[0029] In use, if the valve is not opened, the third ball valve 13 can be manually closed, and the second ball valve 12 is opened, so that the high-pressure water at the pump end passes through the first ball valve 20 and the second ball valve 12 to reach the lower cavity of the cylinder body 4, the medium pressure drives the piston 7 to move upwards, and drives the valve rod 9 to move upwards, so as to realize manual opening of the valve.

[0030] In use, if the valve is not closed, the first ball valve 20 can be manually closed, and the third ball valve 13 is opened, so that the lower cavity of the cylinder body 4 passes through the third ball valve 13 to discharge the water outside the valve, and after losing the medium pressure, the piston 7 moves downwards, and drives the valve rod 9 to move downwards, so as to realize manual closing of the valve.

[0031] Although the utility model has been described above with reference to the embodiments, various improvements can be made and equivalent parts can be replaced without departing from the scope of the utility model. In particular, as long as there is no structural conflict, each feature in the disclosed embodiments of the utility model can be combined in any way, and the combinations are not exhaustively described in the specification only for the purpose of saving space and resources. Therefore, the utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A mechanical control device for a minimum liquid level valve, comprising a valve body (1), characterized in that, A valve seat (2) is fixedly connected inside the valve body (1), a valve cover (3) is fixedly connected to the top of the valve body (1), a cylinder body (4) is fixedly connected to the top of the valve cover (3), a cylinder cover (5) is fixedly connected to the top of the cylinder body (4), a split ring (6) is provided inside the cylinder body (4), a piston (7) is fixedly connected to the middle of the split ring (6), a pressure plate (8) is provided on the top of the split ring (6) and the piston (7), and a valve stem (9) is fixedly connected to the bottom of the piston (7). The valve body (1) is externally fixedly connected to a filter flange cover (17), the filter flange cover (17) is externally fixedly connected to a right-angle welded pipe (18), the top of the right-angle welded pipe (18) is fixedly connected to a steel pipe (19), and a ball valve (20) is fixedly connected to the middle of the steel pipe (19). The cylinder body (4) is fixedly connected to a pipe joint (10), and a three-way pipe (11) is fixedly connected to the outside of the pipe joint (10). A ball valve (12) and a ball valve (13) are respectively installed in the two pipes at the outer end of the three-way pipe (11). A single-control two-position three-way valve (14) is installed on the top of the ball valve (12) and the ball valve (13). A solenoid valve assembly (15) is installed on the outside of the cylinder body (4).

2. The mechanical control device for the minimum liquid level valve according to claim 1, characterized in that, The solenoid valve assembly (15) is provided with a solenoid valve protective cover (16) on its exterior.

3. The mechanical control device for the minimum liquid level valve according to claim 1, characterized in that, The top of the No. 1 ball valve (20) is provided with a welded end straight pipe joint (21), which is connected to the pipeline corresponding to the No. 2 ball valve (12).

4. The mechanical control device for the minimum liquid level valve according to claim 1, characterized in that, The bottom end of the valve stem (9) corresponds to the position of the valve seat (2).

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