Pressure control swing valve with stop valve

Abstract

The pressure control swing valve comprises an air inlet pipe, a vacuum reaction cavity is installed at the bottom end of the air inlet pipe, the bottom end of the vacuum reaction cavity is connected with the top end of the stop valve, a pressure control swing valve body is installed at the bottom end of the stop valve, and a molecular pump is installed at the bottom of the pressure control swing valve body. A top clamping groove is formed in the bottom face of the vacuum reaction cavity, the top clamping groove is attached to the top of the damping mechanism, the bottom of the damping mechanism is attached to a bottom clamping groove, the bottom clamping groove is formed in the middle of the top face of the stop valve box, and the stop valve box is arranged on one side of the stop valve. According to the pressure control swing valve with the stop valve, the novel structural design is adopted, the stop valve is integrated at the air inlet of the swing valve, and the stop valve is closed when the swing valve needs to be maintained, so that a vacuum reaction cavity cannot be influenced by maintenance of the swing valve, a vacuum environment can be continuously kept, the restarting time is shortened, and devices in the vacuum reaction cavity cannot be damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of swing valves, in particular to a pressure-controlling swing valve with a stop valve. Background Art

[0002] A swing valve is a pressure-control valve in which the valve plate is driven by a motor in a vacuum to adjust the valve opening, thereby adjusting the airflow capacity and maintaining the vacuum chamber at a set pressure. It is widely used in many fields, including sewage treatment, chemical industry, oil and gas industry, food and pharmaceutical industry, water treatment and water supply systems, and energy industry.

[0003] The existing pressure control swing valve body is directly connected to the vacuum reaction chamber. Since the pressure control swing valve body needs to replace parts regularly, when maintaining, opening the valve will not only destroy the vacuum environment of the vacuum reaction chamber, but also some devices inside the vacuum reaction chamber that are sensitive to the atmospheric environment are easily damaged during this process, and it takes a long time to restore to the vacuum environment. In view of the above problems, it is urgent to carry out innovative design based on the original pressure control swing valve body. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure-controlled swing valve with a stop valve to solve the problem proposed in the above background technology that the existing pressure-controlled swing valve body is directly connected to the vacuum reaction chamber. Since the pressure-controlled swing valve body needs to replace parts regularly, when maintenance is performed, opening the valve will not only destroy the vacuum environment of the vacuum reaction chamber, but also some devices inside the vacuum reaction chamber that are sensitive to the atmospheric environment are easily damaged in the process, and it takes a long time to restore to the vacuum environment.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure-controlled swing valve with a stop valve, comprising an air inlet pipe, a vacuum reaction chamber is installed at the bottom end of the air inlet pipe, the bottom end of the vacuum reaction chamber is connected to the top end of the stop valve, a pressure-controlled swing valve body is installed at the bottom end of the stop valve, a molecular pump is installed at the bottom of the pressure-controlled swing valve body, a top card groove is opened on the bottom surface of the vacuum reaction chamber, the top card groove is fitted with the top of the shock-absorbing mechanism, the bottom of the shock-absorbing mechanism is fitted with the bottom card groove, the bottom card groove is opened in the middle of the top surface of the stop valve box, and the stop valve box is arranged on one side of the stop valve.

[0006] Preferably, the shock absorbing mechanism comprises a middle threaded column, a stabilizing seat and a buffer pad, the top and bottom ends of the middle threaded column are both installed with stabilizing seats, and the ends of the stabilizing seats are both fixedly installed with buffer pads.

[0007] Preferably, the stabilizing seat and the buffer pad are symmetrically distributed about the center of the middle threaded column, the front view shape of the stabilizing seat is a "T" shape, and the stabilizing seat is threadedly connected to the middle threaded column.

[0008] Preferably, a stop valve cylinder is installed at the inner end of the stop valve box away from the stop valve, the end of the stop valve cylinder is connected and fixed to one end of a stop valve connecting rod, a stop valve pulley is installed on the stop valve connecting rod close to the stop valve cylinder end, a stop valve wedge block is fixedly installed on the inner wall of the stop valve box above the stop valve pulley, a stop valve bellows is installed on the stop valve connecting rod on the other side of the stop valve pulley, the stop valve bellows is connected to the side wall of the stop valve box, the stop valve connecting rod penetrates the side wall of the stop valve box, and a stop valve plate is fixed to the other end of the stop valve connecting rod.

[0009] Preferably, the length of the stop valve wedge block is greater than 1.5 times the diameter of the stop valve pulley, and the bottom end of the stop valve wedge block is lower than the top end of the stop valve pulley.

[0010] Preferably, the center of the stop valve plate and the center of the top opening of the pressure control swing valve body are on the same vertical plane, and the diameter of the stop valve plate is larger than the diameter of the top opening of the pressure control swing valve body.

[0011] Compared with the prior art, the utility model has the following beneficial effects: the pressure-controlled swing valve with a stop valve adopts a novel structural design, and a stop valve is integrated at the air inlet of the swing valve. When the swing valve needs maintenance, the stop valve is closed, so that the vacuum reaction chamber will not be affected by the maintenance of the swing valve, and the vacuum environment can be continuously maintained, the restart time is shortened, and the components inside the vacuum reaction chamber will not be damaged;

[0012] 1. Use the cylinder to push the stop valve pulley, stop valve connecting rod and stop valve plate to move forward horizontally and linearly. When the stop valve pulley encounters the stop valve wedge block, the stop valve wedge block squeezes the stop valve pulley, causing the stop valve pulley, stop valve connecting rod and stop valve plate to produce vertical displacement, so that the stop valve plate and the bottom of the stop valve box fit together, isolating the vacuum environment of the space connecting the upper part with the vacuum reaction chamber;

[0013] 2. The shock absorbing mechanism is in contact with the vacuum reaction chamber and the stop valve box to support the vacuum reaction chamber and the stop valve box, so as to prevent the vibration generated by the molecular pump during operation from being transmitted to the outwardly extending and narrow stop valve box, thereby greatly weakening the vibration of the stop valve box and preventing the internal parts of the stop valve box from being affected by the vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the front cross-sectional structure of the utility model;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the stop valve and the stop valve box of the utility model;

[0017] Figure 4 It is a front view cross-sectional structural diagram of the shock absorbing mechanism of the utility model.

[0018] In the figure: 1. air inlet pipe; 2. vacuum reaction chamber; 3. stop valve; 4. pressure control swing valve body; 5. molecular pump; 6. top card slot; 7. shock absorbing mechanism; 701. middle threaded column; 702. stabilizing seat; 703. buffer pad; 8. bottom card slot; 9. stop valve box; 10. stop valve cylinder; 11. stop valve pulley; 12. stop valve wedge block; 13. stop valve bellows; 14. stop valve connecting rod; 15. stop valve plate. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-4 The utility model provides a technical solution: a pressure-controlled swing valve with a stop valve, comprising an intake pipe 1, a vacuum reaction chamber 2, a stop valve 3, a pressure-controlled swing valve body 4, a molecular pump 5, a top card slot 6, a shock absorbing mechanism 7, a middle threaded column 701, a stabilizing seat 702, a buffer pad 703, a bottom card slot 8, a stop valve box 9, a stop valve cylinder 10, a stop valve pulley 11, a stop valve wedge block 12, a stop valve bellows 13, a stop valve connecting rod 14 and a stop valve plate 15. A vacuum reaction chamber 2 is arranged at the bottom end of the intake pipe 1, the vacuum reaction chamber 2 is mounted on the top of the stop valve 3, a pressure-controlled swing valve body 4 is mounted on the bottom end of the stop valve 3, a molecular pump 5 is arranged at the bottom of the pressure-controlled swing valve body 4, a top card slot 6 is opened on the bottom surface of the vacuum reaction chamber 2, the top card slot 6 is fitted with the top of the shock absorbing mechanism 7, the bottom of the shock absorbing mechanism 7 is fitted with the bottom card slot 8, and the bottom card slot 8 is opened in the middle of the top surface of the stop valve box 9;

[0021] The shock absorbing mechanism 7 comprises a middle threaded column 701, a stabilizing seat 702 and a buffer pad 703. The top and bottom ends of the middle threaded column 701 are both installed with stabilizing seats 702, and the ends of the stabilizing seats 702 are both fixedly installed with buffer pads 703. The above-mentioned structural design can support the vacuum reaction chamber 2, buffer and damp the stop valve box 9, and protect the internal components of the stop valve box 9. The stabilizing seat 702 and the buffer pad 703 are both symmetrically distributed about the center of the middle threaded column 701. The front view shape of the stabilizing seat 702 is a "T" shape. The stabilizing seat 702 is threadedly connected to the middle threaded column 701. The above-mentioned structural design ensures that the two groups of stabilizing seats 702 and the buffer pads 703 can be in stable contact with the top card slot 6 and the bottom card slot 8 respectively, so as to achieve support for the vacuum reaction chamber 2 and buffer protection for the stop valve box 9. When the device is working normally, the shock absorbing mechanism 7 is as follows Figure 1 and Figure 2 As shown, the card is clamped between the top card slot 6 and the bottom card slot 8 to support the vacuum reaction chamber 2 and to buffer and dampen the stop valve box 9, thereby preventing the vibration generated by the operation of the molecular pump 5 from damaging the internal components of the stop valve box 9;

[0022] The stop valve box 9 is arranged on one side of the stop valve 3, and a stop valve cylinder 10 is installed at the inner end of the stop valve box 9 away from the stop valve 3. The end of the stop valve cylinder 10 is connected and fixed to one end of a stop valve connecting rod 14, and a stop valve pulley 11 is installed on the end of the stop valve connecting rod 14 close to the stop valve cylinder 10. A stop valve wedge block 12 is fixedly installed on the inner wall of the stop valve box 9 above the stop valve pulley 11, and a stop valve bellows 13 is installed on the stop valve connecting rod 14 on the other side of the stop valve pulley 11. The stop valve bellows 13 is connected to the side wall of the stop valve box 9, and the stop valve connecting rod 14 penetrates the side wall of the stop valve box 9. A stop valve plate 15 is fixed to the other end of the stop valve connecting rod 14. The above-mentioned structural design enables the stop valve plate 15 to be conveniently controlled for water It moves horizontally and displaces in the vertical direction to close the connection between the bottom of the stop valve box 9 and the top of the pressure control swing valve body 4. The length of the stop valve wedge block 12 is greater than 1.5 times the diameter of the stop valve pulley 11, and the bottom end of the stop valve wedge block 12 is lower than the top of the stop valve pulley 11. The above structural design ensures that the stop valve wedge block 12 can stably squeeze the stop valve pulley 11 when it contacts the stop valve pulley 11, so that the stop valve connecting rod 14 is deformed in the vertical direction. The center of the stop valve plate 15 and the center of the top opening of the pressure control swing valve body 4 are on the same vertical plane. The diameter of the stop valve plate 15 is greater than the diameter of the top opening of the pressure control swing valve body 4. The above structural design ensures the closing effect of the stop valve plate 15 on the pressure control swing valve body 4;

[0023] When the pressure control swing valve needs maintenance, control Figure 3The stop valve cylinder 10 in the cut-off valve pushes the stop valve pulley 11, the stop valve connecting rod 14 and the stop valve plate 15 to move forward horizontally and linearly. When the top of the stop valve pulley 11 is released from the stop valve wedge block 12, the stop valve wedge block 12 squeezes the stop valve pulley 11, causing the stop valve pulley 11, the stop valve connecting rod 14 and the stop valve plate 15 to produce vertical displacement, so that the stop valve plate 15 and the bottom of the stop valve box 9 fit together, isolating the vacuum environment of the space connected to the vacuum reaction chamber 2 above, and avoiding the vacuum reaction chamber 2 from being affected. This is the working principle of the pressure-controlled swing valve with a stop valve.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressure control swing valve with a stop valve, comprising an air inlet pipe (1), characterized in that: A vacuum reaction chamber (2) is installed at the bottom end of the air inlet pipe (1), the bottom end of the vacuum reaction chamber (2) is connected to the top end of the stop valve (3), a pressure control swing valve body (4) is installed at the bottom end of the stop valve (3), a molecular pump (5) is installed at the bottom of the pressure control swing valve body (4), a top card slot (6) is provided on the bottom surface of the vacuum reaction chamber (2), the top card slot (6) is fitted with the top of the shock absorbing mechanism (7), the bottom of the shock absorbing mechanism (7) is fitted with the bottom card slot (8), the bottom card slot (8) is provided in the middle of the top surface of the stop valve box (9), and the stop valve box (9) is arranged on one side of the stop valve (3).

2. A pressure-control swing valve with a stop valve according to claim 1, characterized in that: The shock absorbing mechanism (7) comprises a middle threaded column (701), a stabilizing seat (702) and a buffer pad (703); the stabilizing seat (702) is installed at the top and bottom of the middle threaded column (701); and the buffer pad (703) is fixedly installed at the end of the stabilizing seat (702).

3. A pressure-control swing valve with a stop valve according to claim 2, characterized in that: The stabilizing seat (702) and the buffer pad (703) are both symmetrically distributed about the center of the middle threaded column (701); the front view shape of the stabilizing seat (702) is a "T" shape; the stabilizing seat (702) and the middle threaded column (701) are threadedly connected.

4. A pressure-control swing valve with a stop valve according to claim 1, characterized in that: A stop valve cylinder (10) is installed at the inner end of the stop valve box (9) away from the stop valve (3), and the end of the stop valve cylinder (10) is connected and fixed to one end of a stop valve connecting rod (14). A stop valve pulley (11) is installed at the end of the stop valve connecting rod (14) close to the stop valve cylinder (10). A stop valve wedge block (12) is fixedly installed on the inner wall of the stop valve box (9) above the stop valve pulley (11), and a stop valve bellows (13) is installed on the stop valve connecting rod (14) on the other side of the stop valve pulley (11). The stop valve bellows (13) is connected to the side wall of the stop valve box (9), and the stop valve connecting rod (14) penetrates the side wall of the stop valve box (9). A stop valve plate (15) is fixed to the other end of the stop valve connecting rod (14).

5. A pressure-control swing valve with a stop valve according to claim 4, characterized in that: The length of the stop valve wedge block (12) is greater than 1.5 times the diameter of the stop valve pulley (11), and the bottom end of the stop valve wedge block (12) is lower than the top end of the stop valve pulley (11).

6. A pressure-control swing valve with a stop valve according to claim 4, characterized in that: The center of the stop valve plate (15) and the center of the top opening of the pressure control swing valve body (4) are located on the same vertical plane, and the diameter of the stop valve plate (15) is greater than the diameter of the top opening of the pressure control swing valve body (4).

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