Integrated combined plunger valve

Abstract

The utility model relates to the technical field of plunger valves, and discloses an integrated combined plunger valve which comprises a first plunger, a first valve seat, a valve body, a support stand column, a valve rod and a double-acting air cylinder, a first gasket is arranged on the top of the first valve seat, a small valve element and a first spring are arranged in the first plunger, and a large valve element is arranged in the valve body. The integrated combined plunger valve is specially designed for the chemical industry, is particularly suitable for high-performance resin projects such as PMMA (polymethyl methacrylate) devices and the like, is provided with three channels and one nitrogen input port, and can realize the on-off function of the valve under three different working conditions according to process requirements; according to the plunger valve, the two sealing pairs are arranged in the plunger valve, the purging and flushing valve and other structures are designed and installed through the opening in the side face of the valve body, the functions of a plurality of original valves are ingeniously integrated, the requirements of three different working conditions are met, and compared with the prior art, the plunger valve is novel in structure and compact in design, effectively reduces the installation space and reduces the valve cost.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger valves, and more specifically, to an integrated combined plunger valve. Background Art

[0002] The plunger valve is composed of a valve body, bonnet, stem, plunger, hole frame, sealing ring, and handwheel. When the handwheel rotates, the stem drives the plunger to move up and down within the hole frame, completing the valve's opening and closing functions. An interference fit is employed between the plunger and the sealing ring. By adjusting the flange bolts in the gland, the lateral force generated by the sealing ring's compression seals against the hole surface in the valve body and the outer diameter of the plunger, ensuring the valve's tightness and preventing internal and external leakage. Simultaneously, the valve's opening torque is minimal, enabling rapid opening and closing.

[0003] The most common plunger valves currently on the market are mainly one-way plunger valves. This type of valve can only achieve circulation and closure in one direction. Although it has a simple structure and excellent sealing performance, it lacks flexibility. At the same time, although there are a small number of two-way plunger valve designs, they often sacrifice some sealing performance during the control process of multi-directional opening and closing due to their complex structure. However, with the accelerated development of the industrialization process, higher requirements are placed on the functionality and flexibility of valves, and one-way plunger valves can no longer meet the diverse needs of industrial applications. Therefore, the present application innovatively proposes a three-way integrated combination plunger valve, which aims to combine the sealing advantages of a one-way plunger valve with the flexibility of a two-way valve to meet the urgent needs of modern industry for efficient and reliable fluid control systems. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides an integrated combined plunger valve.

[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an integrated combined plunger valve, comprising a first plunger, a first valve seat, a valve body, a support column, a valve stem, and a double-acting cylinder, wherein a first gasket is provided on the top of the first valve seat, a small valve core and a first spring are provided inside the first plunger, a large valve core is provided inside the valve body, a spring seat, a sealing gasket, a sealing gasket pressure plate, and a second nut are provided at the bottom end of the large valve core; a packing spacer, a first combined packing, a first packing pressure sleeve and a first packing pressure plate are provided between the valve body and the large valve core, an anti-rotation plate and a hexagon socket screw are provided on the top of the large valve core, and the large valve core is fixedly connected to the valve stem by the anti-rotation plate and the hexagon socket screw; the first valve seat is connected to the pipeline flange, the first valve seat is inserted into the pipeline, and the end portion is flush with the pipeline, the first plunger and the first valve seat form a sealing pair, the large valve core and the first plunger are fixedly connected by threads, and the large valve core and the support column are welded into one;

[0006] The bottom end of the first plunger is provided with an A port, the left end of the valve body is provided with a C port, the right end of the valve body is provided with a second valve seat, a second gasket and a purge and flushing valve, and the purge and flushing valve port is provided with a B port.

[0007] As an optimal technical solution of the present invention, the combined plunger valve can realize three different on-off modes, namely:

[0008] The first plunger A port is open to C port, A port is closed to B port, and B port is closed to C port;

[0009] The first valve seat has port B to port C open, port A to port C closed, and port A to port B closed;

[0010] The first gasket connects port A to port B, ports A to C are closed, and ports B to C are closed.

[0011] As an optimal technical solution of the present invention, the right end of the purge and flushing valve is also provided with a second combined packing, a second packing sleeve, a second packing pressure plate, a second plunger, a connecting nut, a push rod, a single-acting cylinder and a second spring.

[0012] As an optimal technical solution of the present invention, the interior of the first plunger is designed as a hollow flow channel, and is fixed to an assembly with the first spring, spring seat, sealing gasket and sealing gasket pressure plate by a second nut, installed in the first plunger, and forms two sealing pairs with the large valve core and the first plunger respectively.

[0013] As a preferred technical solution of the present invention, a check valve is provided on the top of the large valve core, and the check valve is externally provided with a B port, which is composed of a metal hose, a purge ball valve and a ball valve cylinder;

[0014] As an optimal technical solution of the present invention, the B port is externally connected to nitrogen, and in emergency discharge conditions, the nitrogen at the B port is used to reversely discharge the material in the reactor from the process pipeline.

[0015] As a preferred technical solution of the present invention, the sealing between the first plunger and the valve body packing hole is achieved by the first packing pressure plate squeezing the first packing sleeve and tightening the first packing sleeve, and the first packing sleeve deforms and laterally squeezes the first plunger and the valve body packing hole to achieve sealing.

[0016] As a preferred technical solution of the present invention, the metal hose can make the B port follow the valve stem to move up and down, accompanying the valve stem, the large valve core, and the first plunger assembly to move up and down.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] The integrated combined plunger valve of the utility model is designed for the chemical industry and is particularly suitable for high-performance resin projects such as PMMA devices. The plunger valve integrates three channels and a nitrogen inlet, which can flexibly realize the valve on-off function under three different working conditions according to process requirements. Its innovation lies in that the interior of the plunger is designed with two sealing pairs, and the side of the valve body is cleverly opened to install structures such as purge and flushing valves, successfully integrating the functions that originally required the collaboration of multiple valves into a single valve, meeting the requirements of various working conditions in the process. Compared with the existing technology, the present invention not only has a novel structure and sophisticated design, but also has a compact layout of each channel, which significantly reduces the installation space of the valve and effectively reduces the overall valve cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the partial structure of the first plunger of the utility model;

[0022] Figure 4 This is a schematic diagram of the partial structure of the purge and flushing valve of the utility model;

[0023] Figure 5 This is a schematic diagram of the partial structure of the first combined filler of the utility model;

[0024] Figure 6 This is a schematic diagram of the operation of the plunger valve of the utility model.

[0025] Figure: 1, first plunger; 2, first valve seat; 3, first gasket; 4, first stud; 5, first nut; 6, spring seat; 7, sealing gasket; 8, sealing gasket pressure plate; 9, second nut; 10, valve body; 11, large valve core; 12, packing spacer; 13, first combination packing; 14, first packing gland; 15, first packing pressure plate; 16, second stud; 17, third nut; 18, bracket column; 19, valve stem; 20, double-acting cylinder; 21, small valve core; 2 2. First spring; 23. Third stud; 24. Fourth nut; 25. Purge and flushing valve; 26. Single-acting cylinder; 27. Check valve; 28. Anti-rotation plate; 29. ​​Hexagon socket screw; 30. Metal hose; 31. Purge ball valve; 32. Ball valve cylinder; 33. Second valve seat; 34. Second gasket; 35. Second combination packing; 36. Second packing gland; 37. Second packing pressure plate; 38. Second plunger; 39. Connecting nut; 40. Push rod; 41. Second spring. DETAILED DESCRIPTION

[0026] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] like Figures 1 to 6 As shown, the utility model provides an integrated combined plunger valve, including a first plunger 1, a first valve seat 2, a valve body 10, a bracket column 18, a valve stem 19, and a double-acting cylinder 20. A first gasket 3 is provided on the top of the first valve seat 2, and a small valve core 21 and a first spring 22 are provided inside the first plunger 1. The sealing surface of the small valve core 21 is hardened and the sealing surface of the inner hole of the first plunger 1 is hardened to form a sealing pair, and the sealing function is achieved by the pre-tightening force provided by the first spring 22. A large valve core 11 is provided inside the valve body 10, and a spring seat 6, a sealing gasket 7, a sealing gasket pressure plate 8, and a second nut 9 are provided at the bottom end of the large valve core 11; a packing spacer 12, a first combination packing 13, a first packing press sleeve 14 and a first packing pressure plate 15 are provided between the valve body 10 and the large valve core 11; an anti-rotation plate 28 and a hexagon socket screw 29 are provided on the top of the large valve core 11. The large valve core 11 is fixedly connected to the valve stem 19 by the anti-rotation plate 28 and the hexagon socket screw 29. Specifically, the valve stem 19, the large valve core 11 welded body and the anti-rotation plate 28 are fixed with the hexagon socket screw 29. The anti-rotation plate 28 is stuck on the bracket column 18, and plays a role in guiding and stabilizing the valve stem 19 during the up and down movement. The large valve core 11 and the sealing gasket 7 form a sealing pair, and the sealing function is achieved by the pre-tightening force provided by the first spring 22; the first valve seat 2 is connected to the pipeline flange, the first valve seat 2 is inserted into the pipeline, and the end is flush with the pipeline. The first plunger 1 and the first valve seat 2 form a sealing pair. The sealing surface of the first plunger 1 is hardened and the sealing surface of the first valve seat 2 is hardened to form a sealing pair. The sealing function is achieved by the thrust provided by the double-acting cylinder 20. The large valve core 11 and the first plunger 1 are fixedly connected by threads, and the large valve core 11 and the bracket column 18 are welded into one;

[0028] The bottom end of the first plunger 1 is provided with an A port, the left end of the valve body 10 is provided with a C port, the right end of the valve body 10 is provided with a second valve seat 33, a second gasket 34 and a purge and flushing valve 25, and the port of the purge and flushing valve 25 is provided with a B port.

[0029] Among them, the combined plunger valve can realize three different on-off modes, namely:

[0030] The first plunger 1A port to C port is open, the port A to B port is closed, and the port B to C port is closed;

[0031] When the double-acting cylinder 20 moves downward, the valve stem 19 can push the first plunger 1 to move, thereby closing the port A→C. Conversely, when the double-acting cylinder 20 moves upward, the valve stem 19 can pull the first plunger 1 to open the port A→C.

[0032] The first valve seat 2B port to C port is open, the port A to C port is closed, and the port A to B port is closed;

[0033] The purge and flushing valve 25 is installed on the side of the valve body 10 and is connected to the port C through the middle cavity of the valve body 10. The second plunger 38 of the purge and flushing valve 25 forms a sealing pair with the second valve seat 33. When the single-acting cylinder 26 is not ventilated, the second spring 41 pushes the push rod 40 to move to the left, and pushes the second plunger 38 to operate through the connecting nut 39, so that the sealing pair of the second plunger 38 and the second valve seat 33 is closed, and the B port to the C port is closed; when the single-acting cylinder 26 is ventilated, the second spring 41 and the push rod 40 move to the right, and the second plunger 38 is pulled to operate through the connecting nut 39, and the purge and flushing valve 25 is opened. The medium can enter the valve body 10 through the port B and enter the port C through the middle cavity of the valve body 10. The B port to the C port are connected. At this time, the purge nitrogen or flushing toluene can be passed from the B port to the C port according to the process requirements to realize nitrogen purge or toluene flushing.

[0034] The first gasket 3 has port A connected to port B, port A connected to port C closed, and port B connected to port C closed.

[0035] Under emergency discharge conditions, nitrogen is passed from port A to port B and enters the reactor from B1, and the material is pressed out of the reactor through the process pipeline with nitrogen.

[0036] The right end of the purge and flushing valve 25 is further provided with a second combined packing 35, a second packing gland 36, a second packing pressure plate 37, a second plunger 38, a connecting nut 39, a push rod 40, a single-acting cylinder 26 and a second spring 41;

[0037] The interior of the first plunger 1 is designed as a hollow flow channel, and is fixed to a component with the first spring 22, the spring seat 6, the sealing gasket 7 and the sealing gasket pressure plate 8 by a nut and a second nut 9. It is installed in the first plunger 1 and forms two sealing pairs with the large valve core 11 and the first plunger 1 respectively. When there is no nitrogen input to B1, these two sealing pairs are in a closed state;

[0038] Among them, a check valve 27 is provided on the top of the large valve core 11, and the check valve 27 is externally connected to a B1 port, which is composed of a metal hose 30, a purge ball valve 31 and a ball valve cylinder 32;

[0039] Among them, the B1 port is connected to nitrogen, and in emergency discharge conditions, the nitrogen at the B1 port is used to discharge the material in the reactor from the process pipeline in reverse.

[0040] When the ball valve cylinder 32 opens the purge ball valve 31, nitrogen is input from B1 through the metal hose 30 and the check valve 27 into the large valve core 11, and the two sealing pairs are opened at the same time, and the nitrogen enters the reactor and presses the material in the reactor into the process pipeline.

[0041] The sealing between the first plunger 1 and the packing hole of the valve body 10 is achieved by the first packing pressing plate 15 squeezing the first packing pressing sleeve 14 and pressing the first packing pressing sleeve 14 tightly. The first packing pressing sleeve 14 deforms and laterally squeezes the first plunger 1 and the packing hole of the valve body to achieve sealing.

[0042] The metal hose 30 enables the B1 port to move up and down along with the valve stem 19 , and the valve stem 19 , the large valve core 11 , and the first plunger 1 assembly to move up and down.

[0043] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0044] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An integrated combined plunger valve, comprising a first plunger (1), a first valve seat (2), a valve body (10), a support column (18), a valve stem (19), and a double-acting cylinder (20), characterized in that: A first gasket (3) is provided on the top of the first valve seat (2), a small valve core (21) and a first spring (22) are provided inside the first plunger (1), a large valve core (11) is provided inside the valve body (10), and a spring seat (6), a sealing gasket (7), a sealing gasket pressure plate (8), and a second nut (9) are provided at the bottom end of the large valve core (11); a packing spacer (12), a first combined packing (13), a first packing pressure sleeve (14), and a first packing pressure plate (15) are provided between the valve body (10) and the large valve core (11). ), the top of the large valve core (11) is provided with an anti-rotation plate (28) and a hexagon socket screw (29), and the large valve core (11) is fixedly connected to the valve stem (19) through the anti-rotation plate (28) and the hexagon socket screw (29); the first valve seat (2) is connected to the pipeline flange, the first valve seat (2) is inserted into the pipeline, and the end is flush with the pipeline, the first plunger (1) and the first valve seat (2) form a sealing pair, the large valve core (11) and the first plunger (1) are fixedly connected by threads, and the large valve core (11) and the bracket column (18) are welded into one body; The bottom end of the first plunger (1) is provided with an A port, the left end of the valve body (10) is provided with a C port, the right end of the valve body (10) is provided with a second valve seat (33), a second gasket (34) and a purge and flushing valve (25), and the purge and flushing valve (25) is provided with a B port.

2. The integrated combined plunger valve according to claim 1, characterized in that: The combined plunger valve can realize three different on-off modes: The first plunger (1) is connected from port A to port C, is closed from port A to port B, and is closed from port B to port C; The first valve seat (2) has a B port connected to a C port, a A port connected to a C port closed, and a A port connected to a B port closed; The first gasket (3) is connected from port A to port B, is closed from port A to port C, and is closed from port B to port C.

3. The integrated combined plunger valve according to claim 1, characterized in that: The right end of the purge and flushing valve (25) is also provided with a second combined packing (35), a second packing pressing sleeve (36), a second packing pressing plate (37), a second plunger (38), a connecting nut (39), a push rod (40), a single-acting cylinder (26) and a second spring (41).

4. The integrated combined plunger valve according to claim 1, characterized in that: The interior of the first plunger (1) is designed as a hollow flow channel, and is fixed to a first spring (22), a spring seat (6), a sealing gasket (7) and a sealing gasket pressure plate (8) by a nut and a second nut (9) to form an assembly, which is installed in the first plunger (1) and forms two sealing pairs with the large valve core (11) and the first plunger (1) respectively.

5. The integrated combined plunger valve according to claim 1, characterized in that: A check valve (27) is provided on the top of the large valve core (11). The check valve (27) is externally connected to a B1 port and consists of a metal hose (30), a purge ball valve (31) and a ball valve cylinder (32).

6. The integrated combined plunger valve according to claim 5, characterized in that: The B1 port is externally connected to nitrogen, and in emergency discharge conditions, the nitrogen at the B1 port is used to reversely discharge the material in the reactor from the process pipeline.

7. The integrated combined plunger valve according to claim 1, characterized in that: The sealing between the first plunger (1) and the packing hole of the valve body (10) is achieved by the first packing pressing plate (15) squeezing the first packing pressing sleeve (14) and pressing the first packing pressing sleeve (14), and the first packing pressing sleeve (14) deforms and laterally squeezes the first plunger (1) and the packing hole of the valve body to achieve sealing.

8. The integrated combined plunger valve according to claim 5, characterized in that: The metal hose (30) can make the B1 port follow the valve stem (19) to move up and down, accompanying the valve stem (19), the large valve core (11), and the first plunger (1) to move up and down.

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