Adjustable feeding screw pump

Abstract

The utility model discloses an adjustable feeding screw pump, and belongs to the technical field of screw pumps. The adjustable and controllable feeding screw pump comprises a screw pump body, the screw pump body comprises a discharging pipe and a feeding pipe, and a conical pipe is arranged at the position of the feeding pipe; a water outlet pipe is arranged on the outer side of the conical pipe, and an anti-backflow mechanism is arranged in the conical pipe; the anti-backflow mechanism comprises an inner sleeve, a plug, a sealing rod, a supporting seat and a spring, the inner sleeve is inserted into the conical pipe, a sealing part is arranged at the upper end of the plug, and the sealing part is matched with the inner wall of the inner sleeve; the sealing rod is installed on the plug, the supporting seat is installed in the conical pipe, the sealing rod is in sliding fit with the supporting seat, one end of the spring abuts against the supporting seat, and the other end of the spring is connected with the plug. According to the adjustable and controllable feeding screw pump, in the process of replacing a new water outlet pipe, the situation that materials in the screw pump flow back to pollute the connecting position of the conical pipe and the water outlet pipe is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of screw pump technology, specifically relating to an adjustable feeding screw pump. Background Technology

[0002] A screw pump is a positive displacement rotary pump that relies on the volume change of the sealed cavity formed by the screw and bushing to draw in and discharge liquids. Screw pumps are characterized by stable flow rate, low pressure pulsation, self-priming capability, low noise, high efficiency, long service life, and reliable operation.

[0003] Chinese Patent No. CN 208534747 U discloses a heat-insulating screw pump, which includes a replacement mechanism, a wiping mechanism, and a device body. The device body includes a chassis, a motor, a pump body, and a flange. The motor is fixed to the right side of the upper end face of the chassis via a mounting seat. The pump body is assembled on the left end of the motor and fixed to the left side of the upper end face of the chassis. The flange is installed on the left end of the pump body. The replacement mechanism is installed on the upper side of the annular side of the pump body. The replacement mechanism includes a flange, a cover, a rubber gasket, a filter screen, a flange, and a screw.

[0004] When adjusting the feed rate at the screw pump feed pipe, it is sometimes necessary to replace the pipe with one of different diameters. However, when using the aforementioned device to replace the pipe, backflow of material inside the screw pump can easily occur. The backflowing material can contaminate the connection surface between the pipe and the screw pump, and the contaminated connection surface is prone to leakage due to poor sealing. Therefore, this application proposes an adjustable feed screw pump. Utility Model Content

[0005] The purpose of this invention is to provide an adjustable feeding screw pump to solve the problem that, when the existing device mentioned in the background art is replaced, the material inside the screw pump is prone to backflow. The backflowing material will contaminate the connection surface between the pipe and the screw pump, and the contaminated connection surface is prone to leakage due to poor sealing.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable feeding screw pump, including a screw pump body, wherein the screw pump body includes a discharge pipe and a feed pipe, and a tapered pipe is provided at the feed pipe;

[0007] A water outlet pipe is provided on the outside of the conical tube, and an anti-backflow mechanism is provided inside the conical tube;

[0008] The anti-backflow mechanism includes an inner sleeve, a plug, a sealing rod, a support base, and a spring. The inner sleeve is inserted into the tapered tube, and the upper end of the plug is provided with a sealing part, which cooperates with the inner wall of the inner sleeve.

[0009] The sealing rod is installed on the sealing block, the support seat is installed inside the tapered tube, the sealing rod and the support seat are slidably fitted, one end of the spring abuts against the support seat, and the other end of the spring is connected to the sealing block;

[0010] The outlet pipe is equipped with an opening and closing mechanism for moving the seal.

[0011] Preferably, the screw pump body also includes a pump body, a motor, and a conveying rod, with the discharge pipe and the inlet pipe mounted on the pump body, and the output end of the motor connected to the conveying rod.

[0012] Preferably, the motor and the conveying rod can be connected by a coupling, the conveying rod is inserted into the pump body, and the conveying rod is provided with helically distributed blades.

[0013] Preferably, a waterproof pad is provided at the connection point between the tapered tube and the feed tube.

[0014] Preferably, the outer wall of the inner sleeve fits against the inner wall of the tapered tube.

[0015] Preferably, a sealing groove is provided at the location of the sealing part inside the seal, and a conical sealing sleeve is inserted into the sealing groove.

[0016] Preferably, the opening and closing mechanism includes a pressure sleeve, a lifting plate, a sealing plate, and a pressure ring.

[0017] Preferably, the water outlet pipe is provided with an adjustment groove and a sealing groove, a pressure sleeve connects to a lifting plate, the lifting plate is connected to a sealing plate, the lifting plate cooperates with the adjustment groove, the sealing plate cooperates with the sealing groove, and the sealing plate is installed on the pressure ring.

[0018] Preferably, the pressure sleeve is provided with a slot, which cooperates with the sealing rod in the anti-backflow mechanism.

[0019] Preferably, the pressure ring has a plurality of mounting holes.

[0020] Beneficial effects:

[0021] The adjustable feed screw pump provided by this utility model, when replacing the old water outlet pipe, after removing the old water outlet pipe, the plug and sealing rod, no longer squeezed by the pressure sleeve, will rise upward under the elastic force of the spring. The plug will press against the inner sleeve, blocking the tapered tube. Then, the new water outlet pipe is replaced, and the flange on the new water outlet pipe presses against the flange on the tapered tube, which then presses down the pressure ring. The pressure ring can push the lifting plate and sealing plate down, and drive the pressure sleeve down. The pressure sleeve presses down the sealing rod, which in turn drives the plug down. Finally, there is a gap between the plug and the inner sleeve. Then, the positions of the pressure ring, water outlet pipe and tapered tube are fixed by bolts and nuts. During the replacement of the new water outlet pipe, there will be no backflow of material in the screw pump, which would contaminate the connection between the tapered tube and the water outlet pipe. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the adjustable feed screw pump in this utility model;

[0023] Figure 2 This is one of the internal structural diagrams of the adjustable feed screw pump in this utility model;

[0024] Figure 3 This is the second schematic diagram of the internal structure of the adjustable feed screw pump in this utility model;

[0025] Figure 4 This is a schematic diagram of the opening and closing mechanism in this utility model;

[0026] Figure 5 This utility model Figure 4 A magnified structural diagram of point A in the middle.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. Screw pump body; 101. Pump body; 102. Motor; 103. Conveying rod; 104. Discharge pipe; 105. Inlet pipe; 2. Conical tube; 3. Waterproof gasket; 4. Water outlet pipe; 401. Adjusting groove; 402. Sealing groove; 5. Anti-backflow mechanism; 501. Inner sleeve; 502. Seal; 503. Sealing rod; 504. Support seat; 505. Spring; 6. Opening and closing mechanism; 601. Pressure sleeve; 602. Sealing plate; 603. Pressure ring. Detailed Implementation

[0029] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0030] like Figures 1-5 As shown in the figure, the adjustable feeding screw pump provided in this embodiment of the utility model includes a screw pump body 1, which includes a discharge pipe 104 and a feed pipe 105. The screw pump body 1 also includes a pump body 101, a motor 102, and a conveying rod 103. The discharge pipe 104 and the feed pipe 105 are mounted on the pump body 101. The output end of the motor 102 is connected to the conveying rod 103. Specifically, the motor 102 and the conveying rod 103 can be connected by a coupling. The conveying rod 103 is inserted into the pump body 101. The conveying rod 103 is provided with spirally distributed blades. The connection between the conveying rod 103 and the pump body 101 should be properly lubricated and sealed to prevent leakage of transported materials.

[0031] To facilitate installation at the feed pipe 105, a tapered pipe 2 is installed at the feed pipe 105. A waterproof gasket 3 is installed at the connection between the tapered pipe 2 and the feed pipe 105. The waterproof gasket 3 is made of waterproof material, and commonly used polyurethane gaskets are sufficient. If the material being conveyed is highly corrosive or has other properties, a suitable waterproof gasket 3 needs to be replaced. It is not simply for waterproofing, but to provide a seal to prevent leakage at the connection between the tapered pipe 2 and the feed pipe 105.

[0032] To prevent material backflow when the water pipe 4 is installed on the conical pipe 2, a water outlet pipe 4 is installed on the outside of the conical pipe 2, and an anti-backflow mechanism 5 is installed inside the conical pipe 2. Similarly, the water outlet pipe 4 is not only for transporting water, but can also transport other liquid materials.

[0033] In specific embodiments, please refer to Figures 3-5 The anti-backflow mechanism 5 includes an inner sleeve 501, a plug 502, a sealing rod 503, a support base 504, and a spring 505. The inner sleeve 501 is inserted into the tapered tube 2, and the outer wall of the inner sleeve 501 fits against the inner wall of the tapered tube 2. The upper end of the plug 502 is provided with a sealing part, which cooperates with the inner wall of the inner sleeve 501. A sealing groove is provided at the position of the sealing part inside the plug 502, and a tapered sealing sleeve is inserted into the sealing groove.

[0034] When the plug 502 is pressed against the inner sleeve 501, it can block the inner sleeve 501. At this time, the material in the pump body 101 is blocked by the plug 502 and there will be no backflow.

[0035] It should be noted that the sealing rod 503 is installed on the plug 502, and the support seat 504 is installed inside the tapered tube 2. The sealing rod 503 and the support seat 504 are in sliding fit, and the support seat 504 is provided with a through hole to allow material flow. One end of the spring 505 abuts against the support seat 504, and the other end of the spring 505 is connected to the plug 502. The spring 505 can be replaced by commonly used elastic washers or other components. In this way, when transporting some highly viscous materials, the elastic washers and other components are less likely to cause material blockage. The elastic washers can push the sealing rod 503 a small distance, which does not affect the normal sealing of the tapered tube 2 when replacing the outlet pipe 4.

[0036] To facilitate the assembly and replacement of the water outlet pipe 4 and control the opening and closing of the plug 502, an opening and closing mechanism 6 is provided inside the water outlet pipe 4. The opening and closing mechanism 6 is used to push the plug 502 to move. The opening and closing mechanism 6 includes a pressure sleeve 601, a lifting plate, a sealing plate 602, and a pressure ring 603. The water outlet pipe 4 is provided with an adjustment groove 401 and a sealing groove 402. The pressure sleeve 601 is provided with a slot, which cooperates with the sealing rod 503 in the anti-backflow mechanism 5. The pressure sleeve 601 is connected to the lifting plate, which is connected to the sealing plate 602. The lifting plate cooperates with the adjustment groove 401, and the sealing plate 602 cooperates with the sealing groove 402. The sealing plate 602 is installed on the pressure ring 603. The pressure ring 603 has the same shape as the flange in the water outlet pipe 4. The water outlet pipe 4 is connected to the tapered pipe 2 by bolts and nuts. The bolts are pressed on the upper side of the pressure ring 603. The pressure ring 603 is provided with several mounting holes.

[0037] When replacing the old outlet pipe 4, after removing the old outlet pipe 4, the plug 502 and the sealing rod 503 lose the compression of the pressure sleeve 601 and will be lifted upward under the elastic force of the spring 505. The plug 502 will press against the inner sleeve 501 and block the tapered tube 2. Then, the new outlet pipe 4 is replaced. The flange on the new outlet pipe presses on the flange on the tapered tube 2 and then presses down the pressure ring 603. The pressure ring 603 can push the lifting plate and the sealing plate 602 to move down and drive the pressure sleeve 601 to move down. The pressure sleeve 601 presses down the sealing rod 503, which in turn drives the plug 502 to move down. Finally, there is a gap between the plug 502 and the inner sleeve 501. At this time, the tapered tube 2 and the outlet pipe 4 are aligned vertically. Some of the material flowing out of the pump body 101 will not be directly discharged to the outside of the screw pump body 1. Then, the positions of the pressure ring 603, the outlet pipe 4, and the tapered tube 2 are fixed by bolts and nuts.

[0038] During the up-and-down movement of the pressure ring 603, the lifting plate always moves within the adjusting groove 401, while the sealing plate 602 always moves within the sealing groove 402. During the movement, the sealing plate 602 can block the adjusting groove 401, thus preventing material leakage.

[0039] In summary: This utility model embodiment provides an adjustable feed screw pump. When replacing the old outlet pipe 4, after removing the old outlet pipe 4, the plug 502 and the sealing rod 503, no longer compressed by the pressure sleeve 601, will rise upwards under the elastic force of the spring 505. The plug 502 will then press against the inner sleeve 501, blocking the tapered tube 2. After replacing the old outlet pipe 4, the flange on the new outlet pipe will press against the flange on the tapered tube 2, thus pressing down the pressure ring 603. 603 can push the lifting plate and sealing plate 602 down, and drive the pressure sleeve 601 down. The pressure sleeve 601 presses down the sealing rod 503, which in turn drives the sealing plug 502 down. Finally, there is a gap between the sealing plug 502 and the inner sleeve 501. At this time, the conical tube 2 and the water blowing pipe 4 are aligned vertically. Some of the material flowing out of the pump body 101 will not be directly discharged to the outside of the screw pump body 1. Then, the positions of the pressure ring 603, the water outlet pipe 4, and the conical tube 2 are fixed by bolts and nuts.

[0040] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An adjustable feed screw pump, comprising a screw pump body (1), wherein the screw pump body (1) includes a discharge pipe (104) and a feed pipe (105), characterized in that, A tapered tube (2) is provided at the feed pipe (105); A water outlet pipe (4) is provided on the outside of the conical pipe (2), and an anti-backflow mechanism (5) is provided inside the conical pipe (2); The backflow prevention mechanism (5) includes an inner sleeve (501), a plug (502), a sealing rod (503), a support seat (504), and a spring (505). The inner sleeve (501) is inserted into the tapered tube (2). The upper end of the plug (502) is provided with a sealing part, which cooperates with the inner wall of the inner sleeve (501). The sealing rod (503) is installed on the sealing block (502), the support seat (504) is installed inside the tapered tube (2), the sealing rod (503) and the support seat (504) are slidably engaged, one end of the spring (505) abuts against the support seat (504), and the other end of the spring (505) is connected to the sealing block (502); The outlet pipe (4) is equipped with an opening and closing mechanism (6) for moving the plug (502).

2. The adjustable feed screw pump as described in claim 1, characterized in that, The screw pump body (1) also includes a pump body (101), a motor (102), a conveying rod (103), a discharge pipe (104), and a feed pipe (105) installed on the pump body (101), and the output end of the motor (102) is connected to the conveying rod (103).

3. The adjustable feed screw pump as described in claim 2, characterized in that, The motor (102) and the conveying rod (103) can be connected by a coupling. The conveying rod (103) is inserted into the pump body (101) and has spirally distributed blades.

4. The adjustable feed screw pump as described in claim 1, characterized in that, A waterproof pad (3) is provided at the connection between the tapered tube (2) and the feed tube (105).

5. The adjustable feed screw pump as described in claim 1, characterized in that, The outer wall of the inner sleeve (501) is fitted with the inner wall of the tapered tube (2).

6. The adjustable feed screw pump as described in claim 5, characterized in that, A sealing groove is provided at the position of the sealing part inside the plug (502), and a conical sealing sleeve is inserted into the sealing groove.

7. The adjustable feed screw pump as described in claim 1, characterized in that, The opening and closing mechanism (6) includes a pressure sleeve (601), a lifting plate, a sealing plate (602), and a pressure ring (603).

8. The adjustable feed screw pump as described in claim 7, characterized in that, The outlet pipe (4) is provided with an adjustment groove (401) and a sealing groove (402). The pressure sleeve (601) is connected to the lifting plate. The lifting plate is connected to the sealing plate (602). The lifting plate cooperates with the adjustment groove (401). The sealing plate (602) cooperates with the sealing groove (402). The sealing plate (602) is installed on the pressure ring (603).

9. The adjustable feed screw pump as described in claim 8, characterized in that, The pressure sleeve (601) is provided with a slot, which cooperates with the sealing rod (503) in the anti-backflow mechanism (5).

10. The adjustable feed screw pump as described in claim 9, characterized in that, The pressure ring (603) has several mounting holes.

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