Novel suction and discharge valve of reciprocating pump

Abstract

The utility model relates to the technical field of reciprocating pumps, in particular to a novel suction and discharge valve of a reciprocating pump. Comprising a discharge valve, a suction valve and a fluid end, the discharge valve is arranged at the upper end of the fluid end, and the suction valve is arranged at the lower end of the fluid end; the discharge valve comprises a first valve seat, a first valve element, a first sealing plug, a first spring protective cover, a first spring, a first spring check ring, a first guide ring and a first sealing O-shaped ring, and the suction valve comprises a second valve seat, a second valve element, a second sealing plug, a second spring protective cover, a second spring, a second spring check ring, a second guide ring and a second sealing O-shaped ring. By means of the structure, disassembly can be achieved without a hydraulic tool, accessories can be replaced without overall disassembly, and the effects of being easy to disassemble and reducing the working intensity of workers are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of reciprocating pumps, in particular to a novel reciprocating pump suction and discharge valve. Background Art

[0002] At present, reciprocating pumps are widely used in various chemical industries in China. The main structure of a reciprocating pump is divided into a power end and a hydraulic end.

[0003] The valve seats of existing reciprocating pumps are installed with a conical interference fit. However, the hydraulic end pump head needs to operate under pressure for a long time, which makes the interference fit between the valve seat and the hydraulic end too firm. When the valve seat needs to be replaced, workers disassemble it, which is time-consuming and laborious, and may even require the use of hydraulic tools such as hydraulic jacks. Furthermore, traditional designs install the suction valve as a whole inside the hydraulic end, resulting in a crowded space inside the hydraulic end pump head. Replacing accessories such as springs requires opening the entire pump head, which increases the worker's workload. Therefore, it is necessary to propose a new reciprocating pump suction and discharge valve that is easy to disassemble and reduces worker workload. Utility Model Content

[0004] The purpose of the utility model is to provide a new reciprocating pump suction and discharge valve, which solves the problem that workers have to spend time and effort to disassemble when replacing the valve seat, and the entire pump head needs to be opened when replacing accessories such as springs, which increases the workload of workers.

[0005] To achieve the above-mentioned purpose, the utility model adopts a novel reciprocating pump suction and discharge valve, comprising a discharge valve, a suction valve and a hydraulic end, wherein the discharge valve is arranged at the upper end of the hydraulic end, and the suction valve is arranged at the lower end of the hydraulic end;

[0006] The discharge valve includes a first valve seat, a first valve core, a first sealing plug, a first spring guard, a first spring, a first spring retaining ring, a first guide ring and a first sealing O-ring. The first valve seat is arranged inside the hydraulic end, the first valve seat has a first guide groove, the first valve core cooperates with the inclined surface of the first valve seat and is located in the first guide groove, the first sealing plug is threadedly connected to the hydraulic end, the first sealing plug has a first through hole, the first valve core passes through the first through hole, the first guide ring and the first sealing O-ring are respectively arranged between the first valve core and the first sealing plug, the first spring guard is threadedly connected to the hydraulic end, and the first spring is arranged between the first spring guard and the first spring retaining ring;

[0007] The suction valve includes a second valve seat, a second valve core, a second sealing plug, a second spring cover, a second spring, a second spring retaining ring, a second guide ring and a second sealing O-ring. The second valve seat is arranged inside the hydraulic end, the second valve seat has a second guide groove, the second valve core cooperates with the second valve seat inclined surface and is located in the second guide groove, the second sealing plug is threadedly connected to the hydraulic end, the second sealing plug has a second through hole, the second valve core passes through the second through hole, the second guide ring and the second sealing O-ring are respectively arranged between the second valve core and the second sealing plug, the second spring retaining ring is arranged on the top of the second valve core, the second spring cover is threadedly connected to the hydraulic end, and the second spring is arranged between the second sealing plug and the second spring retaining ring.

[0008] Wherein, the connection mode of the first valve seat and the second valve seat with the hydraulic end includes one of a thread connection and a lock connection.

[0009] The upper ends of the first valve seat and the second valve seat each have an external thread opposite to the hydraulic end connection thread.

[0010] The upper ends of the first valve seat and the second valve seat both have external threads with a rotation direction opposite to that of the hydraulic end connection lock.

[0011] Wherein, the first spring and the second spring are both arranged outside the hydraulic end.

[0012] Wherein, the first spring retaining ring, the second spring retaining ring, the second sealing plug and the first spring shield all have a mounting boss and a mounting groove.

[0013] The outer sides of the first sealing plug, the first spring shield, the second sealing plug and the second spring shield all have an external hexagonal boss.

[0014] The utility model discloses a novel reciprocating pump suction and discharge valve, in which the plunger performs reciprocating motion during operation. At the beginning, the plunger moves toward the outside of the hydraulic end. At this time, the cavity of the hydraulic end is under negative pressure, the second valve core moves upward and compresses the second spring, the suction valve opens, and the medium enters the cavity of the hydraulic end from the bottom side; when the plunger moves toward the inside of the hydraulic end, the cavity of the hydraulic end is under positive pressure, the second valve core moves downward due to the expansion of the second spring, closing the suction valve, and at the same time, the first valve core moves upward and compresses the first spring, opening the discharge valve, and discharging the medium in the cavity from the hydraulic end through the discharge valve, thereby completing a working cycle; wherein, the first valve seat and the second valve seat are respectively detachably connected to the hydraulic end, the first spring guard is threadedly connected to the hydraulic end, and the second spring guard is threadedly connected to the hydraulic end, and they can be disassembled without hydraulic tools, and the replacement of accessories does not require the entire valve to be disassembled, thereby achieving the effect of simple disassembly and reducing the workload of workers. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural schematic diagram of the novel reciprocating pump suction and discharge valve of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the discharge valve of the present utility model.

[0018] Figure 3 It is a structural schematic diagram of the suction valve of the present utility model.

[0019] 10-discharge valve, 11-first valve seat, 12-first valve core, 13-first sealing plug, 14-first spring cover, 15-first spring, 16-first spring retaining ring, 17-first guide ring, 18-first sealing O-ring, 20-intake valve, 21-second valve seat, 22-second valve core, 23-second sealing plug, 24-second spring cover, 25-second spring, 26-second spring retaining ring, 27-second guide ring, 28-second sealing O-ring, 30-hydraulic end, 40-plunger. DETAILED DESCRIPTION

[0020] See also Figures 1 to 3 ,in Figure 1 This is a structural diagram of a new reciprocating pump suction and discharge valve. Figure 2 It is a schematic diagram of the structure of the discharge valve. Figure 3 It is a structural diagram of the suction valve.

[0021] The utility model provides a new type of reciprocating pump suction and discharge valve: comprising a discharge valve 10, a suction valve 20 and a hydraulic end 30, wherein the discharge valve 10 is arranged at the upper end of the hydraulic end 30, and the suction valve 20 is arranged at the lower end of the hydraulic end 30;

[0022] The discharge valve 10 includes a first valve seat 11, a first valve core 12, a first sealing plug 13, a first spring guard 14, a first spring 15, a first spring retainer 16, a first guide ring 17 and a first sealing O-ring 18. The first valve seat 11 is arranged inside the hydraulic end 30, and the first valve seat 11 has a first guide groove. The first valve core 12 cooperates with the inclined surface of the first valve seat 11 and is located in the first guide groove. The first sealing plug 13 is threadedly connected to the hydraulic end 30. The first sealing plug 13 has a first through hole. The first valve core 12 passes through the first through hole. The first guide ring 17 and the first sealing O-ring 18 are respectively arranged between the first valve core 12 and the first sealing plug 13. The first spring guard 14 is threadedly connected to the hydraulic end 30. The first spring 15 is arranged between the first spring guard 14 and the first spring retainer 16.

[0023] The suction valve 20 includes a second valve seat 21, a second valve core 22, a second sealing plug 23, a second spring guard 24, a second spring 25, a second spring retainer 26, a second guide ring 27 and a second sealing O-ring 28. The second valve seat 21 is arranged inside the hydraulic end 30. The second valve seat 21 has a second guide groove. The second valve core 22 cooperates with the inclined surface of the second valve seat 21 and is located in the second guide groove. The second sealing plug 23 is threadedly connected to the hydraulic end 30. The second sealing plug 23 has a second through hole. The second valve core 22 passes through the second through hole. The second guide ring 27 and the second sealing O-ring 28 are respectively arranged between the second valve core 22 and the second sealing plug 23. The second spring retainer 26 is arranged on the top of the second valve core 22. The second spring guard 24 is threadedly connected to the hydraulic end 30. The second spring 25 is arranged between the second sealing plug 23 and the second spring retainer 26.

[0024] In this embodiment, the plunger 40 performs reciprocating motion during operation. At the beginning, the plunger 40 moves toward the outside of the hydraulic end 30. At this time, the cavity of the hydraulic end 30 is under negative pressure, and the second valve core 22 moves upward to compress the second spring 25. The suction valve 20 is opened, and the medium enters the cavity of the hydraulic end 30 from the bottom side. When the plunger 40 moves toward the inside of the hydraulic end 30, the cavity of the hydraulic end 30 is under positive pressure. The second valve core 22 moves downward due to the expansion of the second spring 25, closing the suction valve 20. At the same time, the first valve core 12 moves upward to compress the first spring 15, opening the discharge valve 10, and discharging the medium in the cavity from the hydraulic end 30 through the discharge valve 10, thereby completing a working cycle. The first valve seat 11 and the second valve seat 21 are respectively detachably connected to the hydraulic end 30. The first valve core 12 is detachably connected to the hydraulic end 30. The first valve seat 11 is matched with the inclined surface, and the first guide groove is used to limit the first valve core 12; the second valve core 22 is matched with the inclined surface of the second valve seat 21, and the second guide groove is used to limit the second valve core 22; the threaded end of the first valve core 12 and the contact part of the first sealing plug 13 are guided by the first guide ring 17, and are sealed by the first sealing O-ring 18; the threaded end of the second valve core 22 and the contact part of the second sealing plug 23 are guided by the second guide ring 27, and are sealed by the second sealing O-ring 28; the first spring guard 14 is threadedly connected to the hydraulic end 30, and the second spring guard 24 is threadedly connected to the second sealing plug 23, which can be disassembled without hydraulic tools, and the replacement of accessories does not require the entire valve to be disassembled, thereby achieving the effect of simple disassembly and reducing the workload of workers.

[0025] Furthermore, the first valve seat 11 and the second valve seat 21 are connected to the hydraulic end 30 by a threaded connection or a locking connection.

[0026] Furthermore, the upper ends of the first valve seat 11 and the second valve seat 21 both have external threads opposite to the connection threads of the hydraulic end 30 .

[0027] Furthermore, the upper ends of the first valve seat 11 and the second valve seat 21 both have external threads with a rotation direction opposite to that of the connection lock of the hydraulic end 30 .

[0028] In this embodiment, the connection method between the first valve seat 11 and the second valve seat 21 and the hydraulic end 30 includes one of a threaded connection and a lock connection, and can be disassembled without hydraulic tools; at the same time, the upper parts of the first valve seat 11 and the second valve seat 21 are provided with external threads for disassembly that are opposite to the threads or locks of the hydraulic end 30, making it easier to disassemble the first valve seat 11 and the second valve seat 21.

[0029] Furthermore, the first spring 15 and the second spring 25 are both disposed outside the hydraulic end 30 .

[0030] In this embodiment, the first spring 15 and the second spring 25 are both arranged outside the hydraulic end 30, the first spring shield 14 is threadedly connected to the hydraulic end 30, and the second spring shield 24 is threadedly connected to the hydraulic end 30. Replacement of the first spring 15 and the second spring 25 does not require disassembly of the entire unit.

[0031] Furthermore, the first spring retaining ring 16 , the second spring retaining ring 26 , the second sealing plug 23 and the first spring shield 14 all have mounting bosses and mounting grooves.

[0032] In this embodiment, the first spring retaining ring 16, the second spring retaining ring 26, the second sealing plug 23 and the first spring shield 14 all have the mounting boss and the mounting groove to prevent the first spring 15 and the second spring 25 from being displaced during operation.

[0033] Furthermore, the outer sides of the first sealing plug 13 , the first spring shield 14 , the second sealing plug 23 and the second spring shield 24 all have external hexagonal bosses.

[0034] In this embodiment, the outer hexagonal boss is used to facilitate disassembly.

[0035] 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. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the utility model.

Claims

1. A new type of reciprocating pump suction and discharge valve, characterized in that: It includes a discharge valve, a suction valve and a hydraulic end, wherein the discharge valve is arranged at the upper end of the hydraulic end, and the suction valve is arranged at the lower end of the hydraulic end; The discharge valve includes a first valve seat, a first valve core, a first sealing plug, a first spring guard, a first spring, a first spring retainer, a first guide ring and a first sealing O-ring. The first valve seat is arranged inside the hydraulic end, the first valve seat has a first guide groove, the first valve core cooperates with the inclined surface of the first valve seat and is located in the first guide groove, the first sealing plug is threadedly connected to the hydraulic end, the first sealing plug has a first through hole, the first valve core passes through the first through hole, the first guide ring and the first sealing O-ring are respectively arranged between the first valve core and the first sealing plug, the first spring retainer is arranged on the top of the first valve core, the first spring guard is threadedly connected to the hydraulic end, and the first spring is arranged between the first spring guard and the first spring retainer; The suction valve includes a second valve seat, a second valve core, a second sealing plug, a second spring cover, a second spring, a second spring retaining ring, a second guide ring and a second sealing O-ring. The second valve seat is arranged inside the hydraulic end, the second valve seat has a second guide groove, the second valve core cooperates with the second valve seat inclined surface and is located in the second guide groove, the second sealing plug is threadedly connected to the hydraulic end, the second sealing plug has a second through hole, the second valve core passes through the second through hole, the second guide ring and the second sealing O-ring are respectively arranged between the second valve core and the second sealing plug, the second spring retaining ring is arranged on the top of the second valve core, the second spring cover is threadedly connected to the hydraulic end, and the second spring is arranged between the second sealing plug and the second spring retaining ring.

2. The novel reciprocating pump suction and discharge valve according to claim 1, characterized in that: The first valve seat and the second valve seat are connected to the hydraulic end in a manner including a threaded connection and a lock connection.

3. The novel reciprocating pump suction and discharge valve according to claim 2, characterized in that: The upper ends of the first valve seat and the second valve seat each have an external thread opposite to the hydraulic end connection thread.

4. The novel reciprocating pump suction and discharge valve according to claim 2, characterized in that: The upper ends of the first valve seat and the second valve seat both have external threads with a rotation direction opposite to that of the hydraulic end connection lock.

5. The novel reciprocating pump suction and discharge valve according to claim 1, characterized in that: The first spring and the second spring are both arranged outside the hydraulic end.

6. The novel reciprocating pump suction and discharge valve according to claim 1, characterized in that: The first spring retaining ring, the second spring retaining ring, the second sealing plug and the first spring shield all have a mounting boss and a mounting groove.

7. The novel reciprocating pump suction and discharge valve according to claim 1, characterized in that: The outer sides of the first sealing plug, the first spring shield, the second sealing plug and the second spring shield all have an external hexagonal boss.

Images