Plunger pump sealing assembly

Abstract

The utility model relates to a plunger pump sealing assembly, and belongs to the technical field of plunger pumps, the plunger pump sealing assembly comprises a pump body and a water flow box fixed on the left side of the pump body, the interior of the pump body is slidably connected with a plunger body, and the outer surface of the plunger body is sleeved with a first sealing gasket and a second sealing gasket; and a moving mechanism for driving the second sealing gasket to move is arranged in the pump body, and a mounting mechanism for mounting the second sealing gasket is arranged on the moving mechanism. According to the plunger pump sealing assembly, a moving mechanism is arranged, a motor is started, the motor drives a first bevel gear to rotate and drives a second bevel gear and a rear-end lead screw to rotate together, the rear-end lead screw drives a front-end lead screw to rotate through a transmission assembly, and through rotation of the lead screws, an upper moving block and a lower moving block are driven to move relatively at the same time; the moving block drives the moving plate and the second sealing gasket to move together through the hinge rod, so that the second sealing gasket abuts against the first sealing gasket, and the situation that secondary sealing cannot be achieved after the first sealing gasket is damaged is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a plunger pump sealing component. Background Art

[0002] The high-pressure plunger pump is a positive displacement pump. The crankshaft drives the plunger assembly to perform piston motion in the working chamber, and the volume of the working chamber produces periodic changes to achieve the purpose of conveying liquid. Structurally, the working chamber of the plunger pump is separated from the outside world by a sealing device, and is connected to the pipeline through the suction valve at the water inlet and the discharge valve at the water outlet.

[0003] For example, a Chinese patent (Announcement No.: CN211258978U) discloses a plunger assembly sealing system for a high-pressure plunger pump, including a pump body, wherein the cavity in the pump body is divided into a crankshaft cavity, a plunger cavity and a water flow cavity which are connected in sequence, a crankshaft and a connecting rod connected to the crankshaft are arranged in the crankshaft cavity, a plunger assembly having one end connected to the connecting rod and the other end leading to the water flow cavity is arranged in the plunger cavity, the plunger cavity includes a mounting cavity leading to the water flow cavity, the plunger assembly includes a plunger and a first sealing member sleeved on the plunger, a first mounting groove coaxial with the plunger is provided on the inner wall of the mounting cavity, the first sealing member includes a low-pressure seal and a high-pressure seal which are sequentially arranged in the first mounting groove to seal the water flow cavity, because when the high-pressure plunger pump moves, the pressure difference formed by the volume change is very large, which is far from being achieved by using a traditional mechanical seal for sealing, and water will seep out after a long time, so the utility model achieves a double high sealing effect by combining a low-pressure seal and a high-pressure seal.

[0004] The above-mentioned plunger assembly sealing system for high-pressure plunger pumps still has certain shortcomings. The plunger is first sealed once by a low-pressure seal. Although the low-pressure water seal cannot achieve a sealing effect, it can play a certain blocking role and can reduce the pressure of the subsequent high-pressure seal. Then, the plunger is sealed for a second time by a high-pressure seal to achieve a high sealing effect. Among them, the oil seal I and the low-pressure water seal are first used for blocking, and then the secondary high-pressure water seal is used for further isolation, and finally the main high-pressure water seal is used for the final sealing. However, after sealing, when the sealing gasket is damaged, water seepage will still occur, and no secondary sealing will be performed, which affects the sealing effect of the plunger. Therefore, the present application proposes a plunger pump sealing assembly to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a plunger pump sealing assembly, which has the advantage of good sealing performance and solves the problem of poor sealing effect of the prior plunger pump.

[0006] To achieve the above object, the utility model provides the following technical solutions: a plunger pump sealing assembly, comprising a pump body and a water flow box fixed to the left side of the pump body, the interior of the pump body is slidably connected with a plunger body, the outer surface of the plunger body is sleeved with a first sealing gasket and a second sealing gasket, the interior of the pump body is provided with a moving mechanism for driving the second sealing gasket to move, and the moving mechanism is provided with an installation mechanism for installing the second sealing gasket;

[0007] The moving mechanism includes a rotating component and a moving component. The rotating component includes two screw rods rotatably connected between the upper and lower sides of the pump body cavity through a bearing seat, a motor fixed to the back of the pump body cavity, a first bevel gear fixed to the output end of the motor, a second bevel gear fixed to the outer surface of the screw rod at the rear end and meshing with the first bevel gear, and a transmission component arranged on the outer surfaces of the two screw rods.

[0008] By adopting this technical solution, the second sealing gasket is driven to move by the moving mechanism, so that the second sealing gasket abuts against the first sealing gasket, thereby preventing the first sealing gasket from being damaged and affecting the seal, and the second sealing gasket can be easily disassembled and assembled through the installation mechanism.

[0009] Furthermore, the moving assembly includes two moving blocks threadedly connected to the outer surface of the screw rod, a hinged rod hinged to the left side of the moving blocks, and a moving plate hinged to the left side of the four hinged rods.

[0010] By adopting this technical solution, when the moving block moves, the moving plate is driven to move through the hinged rod, and the second sealing gasket is driven to move, so that the second sealing gasket abuts against the first sealing gasket, thereby improving the sealing performance.

[0011] Furthermore, the transmission assembly includes a pulley fixed to the outer surface of the screw rod, and the outer surfaces of the two pulleys are transmission-connected with belts.

[0012] By adopting this technical solution, the rear end screw drives the front end screw to rotate through the transmission assembly.

[0013] Furthermore, the thread of the screw rod is divided into two sections, the two sections of thread have opposite directions, and a round hole for the plunger body to slide is opened on the left side of the movable plate.

[0014] By adopting this technical solution, the two moving blocks are driven to move relative to each other or away from each other at the same time through the rotation of the screw rod, and the plunger body is conveniently moved through the circular hole.

[0015] Furthermore, two sliding rods are fixed between the upper and lower sides of the inner cavity of the pump body, and the moving block is slidably connected to the outer surface of the sliding rods.

[0016] By adopting this technical solution, the stability of the moving block is increased during movement, and the moving block is prevented from rotating along with the lead screw.

[0017] Furthermore, the mounting mechanism includes a fixed plate abutting against the left side of the movable plate, the movable plate has two cavities formed inside, and the fixed plate has slots formed on both the upper and lower sides. The mounting mechanism also includes a telescopic rod fixed to the opposite side of the two cavities, a spring sleeved on the outer surface of the telescopic rod, a movable plate fixed to the opposite side of the two telescopic rods, a pull rod fixed to the opposite side of the two movable plates, and a clamping rod fixed to the opposite side of the two movable plates.

[0018] By adopting this technical solution, the second sealing gasket can be easily disassembled and assembled through the installation mechanism.

[0019] Furthermore, the clamping rod is slidably connected to the inside of the clamping slot, a slider is fixed to the right side of the movable plate, a sliding slot is provided on the right side of the inner cavity of the cavity, and the slider is slidably connected to the inside of the sliding slot.

[0020] By adopting this technical solution, the second sealing pad is fixed by clamping the clamping rod into the interior of the clamping groove.

[0021] Furthermore, the opposite sides of the two springs are respectively fixed to the opposite sides of the inner cavities of the two cavities, and the opposite sides of the two springs are respectively fixed to the opposite sides of the two movable plates.

[0022] By adopting this technical solution, the movable plate is reset by the spring, driving the clamping rod to clamp into the inside of the clamping groove, thereby fixing the fixed plate and the second sealing gasket.

[0023] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0024] 1. The piston pump sealing assembly, through the moving mechanism, the motor drives the first bevel gear to rotate, drives the second bevel gear and the rear end screw to rotate together, the rear end screw drives the front end screw to rotate through the transmission assembly, through the rotation of the screw, drives the upper and lower moving blocks to move relatively at the same time, the moving block drives the moving plate and the second sealing gasket to move together through the hinged rod, so that the second sealing gasket abuts against the first sealing gasket to prevent the first sealing gasket from being damaged and unable to be re-sealed.

[0025] 2. The piston pump sealing assembly, through the installation mechanism, pulls the pull rod, drives the movable plate and the clamping rod to move together and squeeze the spring, so that the fixed plate and the movable plate abut against each other, releases the pull rod, resets the movable plate, and makes the clamping rod clamp into the inside of the clamping groove, fixes the fixed plate and the second sealing gasket, and facilitates the second sealing gasket to seal the plunger body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the utility model;

[0027] Figure 2 This is a three-dimensional appearance diagram of the pump body of the utility model;

[0028] Figure 3 It is a schematic diagram of the left side structure of the mobile mechanism of the utility model;

[0029] Figure 4 For this utility model Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0030] In the figure: 1. water flow box; 2. pump body; 3. moving mechanism; 301. motor; 302. first bevel gear; 303. screw rod; 304. second bevel gear; 305. moving block; 306. transmission assembly; 307. hinged rod; 308. moving plate; 4. mounting mechanism; 401. fixed plate; 402. clamping rod; 403. clamping groove; 404. cavity; 405. telescopic rod; 406. spring; 407. movable plate; 408. pull rod; 5. second sealing gasket; 6. plunger body; 7. first sealing gasket. DETAILED DESCRIPTION

[0031] 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.

[0032] See also Figure 1-2 The plunger pump sealing assembly in this embodiment includes a pump body 2 and a water flow box 1 fixed to the left side of the pump body 2. A water inlet hole is opened at the upper end of the water flow box 1, and a water outlet hole is opened on the left side of the water flow box 1. The interior of the pump body 2 is slidably connected with a plunger body 6. The outer surface of the plunger body 6 is sleeved with a first sealing gasket 7 and a second sealing gasket 5. The first sealing gasket 7 abuts against the inner cavity wall of the pump body 2. A moving mechanism 3 for driving the second sealing gasket 5 to move is provided inside the pump body 2. The second sealing gasket 5 is driven to move by the moving mechanism 3 so that the second sealing gasket 5 abuts against the first sealing gasket 7 to prevent the first sealing gasket 7 from affecting the sealing after being damaged. An installation mechanism 4 for installing the second sealing gasket 5 is provided on the moving mechanism 3 to facilitate the disassembly and assembly of the second sealing gasket 5.

[0033] See also Figure 1 and Figure 3In order to facilitate the movement of the second sealing gasket 5, the moving mechanism 3 in this embodiment includes a rotating component and a moving component. The rotating component includes two screw rods 303 rotatably connected between the upper and lower sides of the inner cavity of the pump body 2 through a bearing seat, a motor 301 fixed to the back of the inner cavity of the pump body 2, a first bevel gear 302 fixed to the output end of the motor 301, a second bevel gear 304 fixed to the outer surface of the rear end screw rod 303 and meshing with the first bevel gear 302, and a transmission component 306 provided on the outer surfaces of the two screw rods 303. The rear end screw rod 303 drives the front end screw rod 303 to rotate through the transmission component 306.

[0034] The moving assembly includes two moving blocks 305 threadedly connected to the outer surface of the screw rod 303, a hinged rod 307 hinged to the left side of the moving block 305, and a moving plate 308 hinged to the left side of the four hinged rods 307. When the moving block 305 moves, the moving plate 308 is driven to move through the hinged rod 307, and the second sealing gasket 5 is driven to move, so that the second sealing gasket 5 is abutted against the first sealing gasket 7 to improve the sealing performance.

[0035] The transmission assembly 306 includes a pulley fixed to the outer surface of the screw rod 303 , and the outer surfaces of the two pulleys are connected with belts for transmission. The rear end screw rod 303 drives the front end screw rod 303 to rotate through the transmission assembly 306 .

[0036] In addition, the thread of the screw rod 303 is divided into two sections, and the two sections of the thread are in opposite directions. By rotating the screw rod 303, the two moving blocks 305 are driven to move relative to or away from each other at the same time. A round hole for the piston body 6 to slide is opened on the left side of the moving plate 308 to facilitate the movement of the piston body 6.

[0037] In addition, two sliding rods are fixed between the upper and lower sides of the inner cavity of the pump body 2, and the moving block 305 is slidably connected to the outer surface of the sliding rod, which increases the stability of the moving block 305 when moving and prevents the moving block 305 from rotating with the screw rod 303.

[0038] It should be noted that a sensor is fixed on the left side of the inner cavity of the pump body 2. When the sensor senses that the first sealing gasket 7 is damaged and water is leaking, the motor 301 is started, and the second sealing gasket 5 is driven by the motor 301 to move to the left and abut against the first sealing gasket 7 to improve the sealing performance.

[0039] In the moving mechanism 3 of this embodiment, the motor 301 drives the first bevel gear 302 to rotate, and drives the second bevel gear 304 and the rear end screw rod 303 to rotate together. The rear end screw rod 303 drives the front end screw rod 303 to rotate through the transmission assembly 306. Through the rotation of the screw rod 303, the upper and lower moving blocks 305 are driven to move relative to each other at the same time. The moving block 305 drives the moving plate 308 and the second sealing gasket 5 to move together through the hinge rod 307, so that the second sealing gasket 5 abuts against the first sealing gasket 7 to prevent the first sealing gasket 7 from being unable to seal after being damaged.

[0040] See also Figure 4 In order to facilitate the installation of the second sealing gasket 5, the installation mechanism 4 in this embodiment includes a fixed plate 401 abutting against the left side of the movable plate 308, the movable plate 308 has two cavities 404 formed inside, and the fixed plate 401 has card slots 403 formed on the upper and lower sides. The installation mechanism 4 also includes a telescopic rod 405 fixed to the opposite side of the inner cavity of the two cavities 404, a spring 406 sleeved on the outer surface of the telescopic rod 405, a movable plate 407 fixed to the opposite side of the two telescopic rods 405, a pull rod 408 fixed to the opposite side of the two movable plates 407, and a card rod 402 fixed to the opposite side of the two movable plates 407.

[0041] Among them, the clamping rod 402 is slidably connected to the inside of the clamping slot 403, and is used to fix the fixed plate 401 and the second sealing gasket 5. A slider is fixed to the right side of the movable plate 407, and a sliding groove is opened on the right side of the inner cavity of the cavity 404. The slider is slidably connected to the inside of the sliding groove to increase the stability of the movable plate 407 when moving.

[0042] In addition, the opposite sides of the two springs 406 are respectively fixed to the opposite sides of the inner cavities of the two cavities 404, and the opposite sides of the two springs 406 are respectively fixed to the opposite sides of the two movable plates 407. The movable plates 407 are reset by the springs 406, driving the clamping rod 402 to be clamped into the interior of the clamping slot 403, thereby fixing the fixed plate 401 and the second sealing gasket 5.

[0043] It should be noted that the two telescopic rods 405 include rod sleeves fixed to the opposite sides of the inner cavities of the two cavities 404, connecting rods slidably connected to the inside of the rod sleeves, limit blocks fixed to the back of the connecting rods, and limit grooves opened on the back of the inner cavities of the rod sleeves. The limit blocks are slidably connected to the inside of the limit grooves, and the opposite sides of the two connecting rods are respectively fixed to the opposite sides of the two movable plates 407. The movable plates 407 are made to perform linear motion up and down through the telescopic rods 405.

[0044] The installation mechanism 4 in this embodiment pulls the pull rod 408, drives the movable plate 407 and the clamping rod 402 to move together and squeeze the spring 406, so that the fixed plate 401 abuts against the movable plate 308, releases the pull rod 408, resets the movable plate 407, and makes the clamping rod 402 snap into the inside of the clamping groove 403, thereby fixing the fixed plate 401 and the second sealing gasket 5, and facilitating the second sealing gasket 5 to seal the plunger body 6.

[0045] The electrical components appearing in the text are all electrically connected to the controller and the power supply. The control method of the utility model is controlled by the controller. The control circuit of the controller can be realized by simple programming by technicians in this field. The provision of power supply is also common knowledge in this field. The utility model is mainly used to protect mechanical devices, so the utility model will no longer explain the control method and circuit connection in detail.

[0046] The working principle of the above embodiment is:

[0047] (1) When it is necessary to use the second sealing gasket 5 for sealing, the motor 301 is started. The motor 301 drives the first bevel gear 302 to rotate, and the second bevel gear 304 and the rear end screw 303 are driven to rotate together through the first bevel gear 302. The rear end screw 303 drives the rear end pulley to rotate, and the rear end pulley drives the front end pulley and the front end screw 303 to rotate through the belt. Since the two sections of the screw 303 have opposite thread directions, the screw 303 rotates, driving the upper and lower moving blocks 305 to move relative to each other at the same time. The moving block 305 drives the hinge rod 307 to rotate. The moving block 305 drives the moving plate 308 to move through the hinge rod 307, and the second sealing gasket 5 is pushed to move through the moving plate 308, so that the second sealing gasket 5 abuts against the first sealing gasket 7 for sealing, thereby preventing the first sealing gasket 7 from being damaged and unable to seal.

[0048] (2) When it is necessary to install the second sealing gasket 5, the two pull rods 408 are pulled in opposite directions. The pull rods 408 drive the movable plate 407 to move, and the movable plate 407 drives the clamping rod 402 to move together and squeeze the spring 406 and the telescopic rod 405, so that the fixed plate 401 is abutted against the movable plate 308. The pull rod 408 is released, and the movable plate 407 is reset under the action of the spring 406, driving the clamping rod 402 to move together, so that the clamping rod 402 is clamped into the inside of the clamping groove 403, thereby fixing the fixed plate 401 and the second sealing gasket 5, and facilitating the second sealing gasket 5 to seal the plunger body 6.

Claims

1. A plunger pump sealing assembly, comprising a pump body (2) and a water flow box (1) fixed to the left side of the pump body (2), characterized in that: The pump body (2) is slidably connected to a plunger body (6), the outer surface of the plunger body (6) is sleeved with a first sealing gasket (7) and a second sealing gasket (5), the pump body (2) is provided with a moving mechanism (3) for driving the second sealing gasket (5) to move, and the moving mechanism (3) is provided with a mounting mechanism (4) for mounting the second sealing gasket (5); The moving mechanism (3) comprises a rotating assembly and a moving assembly, wherein the rotating assembly comprises two screw rods (303) rotatably connected between upper and lower sides of the inner cavity of the pump body (2) via a bearing seat, a motor (301) fixed to the back side of the inner cavity of the pump body (2), a first bevel gear (302) fixed to the output end of the motor (301), a second bevel gear (304) fixed to the outer surface of the screw rod (303) at the rear end and meshing with the first bevel gear (302), and a transmission assembly (306) provided on the outer surfaces of the two screw rods (303).

2. A plunger pump sealing assembly according to claim 1, characterized in that: The moving assembly comprises two moving blocks (305) threadedly connected to the outer surface of the screw rod (303), a hinged rod (307) hinged to the left side of the moving blocks (305), and a moving plate (308) hinged to the left side of the four hinged rods (307).

3. A plunger pump sealing assembly according to claim 1, characterized in that: The transmission assembly (306) comprises a pulley fixed to the outer surface of the screw rod (303), and the outer surfaces of the two pulleys are connected to each other with belts.

4. A plunger pump sealing assembly according to claim 2, characterized in that: The thread of the screw rod (303) is divided into two sections, and the two sections of thread have opposite directions. A circular hole for the plunger body (6) to slide is provided on the left side of the movable plate (308).

5. A plunger pump sealing assembly according to claim 2, characterized in that: Two sliding rods are fixed between the upper and lower sides of the inner cavity of the pump body (2), and the moving block (305) is slidably connected to the outer surfaces of the sliding rods.

6. A plunger pump sealing assembly according to claim 2, characterized in that: The mounting mechanism (4) comprises a fixed plate (401) abutting against the left side of the movable plate (308); two cavities (404) are provided inside the movable plate (308); and a clamping groove (403) is provided on both the upper and lower sides of the fixed plate (401). The mounting mechanism (4) further comprises a telescopic rod (405) fixed to the opposite sides of the inner cavities of the two cavities (404), a spring (406) sleeved on the outer surface of the telescopic rod (405), a movable plate (407) fixed to the opposite sides of the two telescopic rods (405), a pull rod (408) fixed to the opposite sides of the two movable plates (407), and a clamping rod (402) fixed to the opposite sides of the two movable plates (407).

7. A plunger pump sealing assembly according to claim 6, characterized in that: The clamping rod (402) is slidably connected to the inside of the clamping slot (403), a sliding block is fixed to the right side of the movable plate (407), a sliding slot is provided on the right side of the inner cavity of the cavity (404), and the sliding block is slidably connected to the inside of the sliding slot.

8. A plunger pump sealing assembly according to claim 6, characterized in that: The opposite sides of the two springs (406) are respectively fixed to the opposite sides of the inner cavities of the two cavities (404), and the opposite sides of the two springs (406) are respectively fixed to the opposite sides of the two movable plates (407).

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