Connecting structure of a three-screw pump main rod and connecting method thereof

Abstract

The application discloses a connecting structure of a three-screw pump main rod and a connecting method thereof, relates to the technical field of three-screw main rod connection, and comprises a screw pump, the inner side of the screw pump is provided with a driving screw, both ends of the driving screw are connected with stabilizing assemblies, both ends of the screw pump are provided with quick-release assemblies, one end of the driving screw is connected with a stabilizing rod, one end of the stabilizing rod is connected with a first stabilizing sleeve, and the other end of the stabilizing rod is provided with a second stabilizing sleeve. The connecting structure of the three-screw pump main rod is connected and supported to the driving screw through the first stabilizing sleeve and the second stabilizing sleeve, the supporting force is further improved through the stabilizing rod, meanwhile, a positioning shaft is connected with a connecting shaft at one end of the driving screw, so that the connecting mode of the main rod and the pump machine is increased, a connecting structure for supporting the main rod is added to the pump machine or the main rod at the connecting position, and the bearing capacity of the main rod is also increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of three-screw main rod connection, in particular to a three-screw pump main rod connection structure and a connection method thereof. BACKGROUND

[0002] Three-screw pump is the largest yield in screw pump, and is a common positive displacement rotor pump. Three-screw pump is mainly composed of a driving screw connected with a motor and two driven screws matched with the driving screw and a pump sleeve fixed in the pump body. The three intermeshing screws form a sealed cavity in the pump sleeve according to each lead, causing sealing between the suction and discharge ports. With the rotation and meshing of the screws, the sealed spaces are continuously formed at the suction port of the pump, the medium entering the suction port is sealed therein, and is continuously pushed to the discharge end from the suction port along the axial direction, so as to continuously discharge the medium sealed in each space. According to the principle of three-screw pump, the flow of the pump is stable, the medium does not form vortex, and the viscosity of the medium is not sensitive, so that high-viscosity medium can be transported.

[0003] However, in the prior art, due to the complex working conditions of the engineering three-screw pump, if the medium discharged from the discharge port is not smooth, the pressure in the pump increases, which has a potential threat to the mechanical seal and pump body assembly of the pump, and is easy to cause damage to the mechanical seal, thereby causing liquid leakage. Therefore, the main rod structure and the pressure that can be borne of the pump have an important relationship with the service life of the pump.

[0004] Therefore, the present application provides a three-screw pump main rod connection structure and a connection method thereof to solve the above problems. SUMMARY

[0005] The present application aims to provide a three-screw pump main rod connection structure and a connection method thereof to solve the problem that if the medium discharged from the discharge port is not smooth, the pressure in the pump increases, which has a potential threat to the mechanical seal and pump body assembly of the pump.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a three-screw pump main rod connection structure, comprising a screw pump, the inner side of the screw pump is provided with a driving screw, both ends of the driving screw are connected with a stabilizing assembly, both ends of the screw pump are provided with a quick release assembly, one end of the driving screw is connected with a stabilizing rod, one end of the stabilizing rod is connected with a first stabilizing sleeve, the other end of the stabilizing rod is provided with a second stabilizing sleeve, the first stabilizing sleeve and the second stabilizing sleeve are sleeved on one end of the driving screw, the other end of the driving screw is connected with a positioning disc, the side surface of the positioning disc is connected with a positioning sleeve, the inner side of the positioning sleeve is provided with a positioning groove, the side surface of the positioning disc is connected with a positioning shaft, one end of the driving screw is provided with a connecting shaft, one end of the connecting shaft is provided with a positioning hole, and one end of the positioning shaft is connected with the inner side of the positioning hole.

[0007] Preferably, one end of the screw pump is connected with a front cover, the other end of the screw pump is installed with a rear cover, the outer side of the front cover and the rear cover is divided into a plurality of quick release screw sleeves, and the inner side of the front cover is provided with a bearing seat.

[0008] Preferably, the first limiting groove is formed in the two ends of the first stabilizing sleeve, the first limiting ring is connected to the inner side of the first limiting groove, the clamping block is installed in the middle part of the stabilizing rod, and the outer side of the clamping block is connected with the inner wall of one end of the screw pump.

[0009] Preferably, the second limiting groove is formed in the two ends of the second stabilizing sleeve, the second limiting ring is connected to the inner side of the second limiting groove, and the second limiting ring is sleeved on the outer wall of one end of the driving screw.

[0010] Preferably, the inner side of the quick release screw sleeve is threadedly connected with a quick release screw bolt, and the other end of the quick release screw bolt is threadedly connected to the two ends of the screw pump.

[0011] Preferably, the front cover is fixedly connected with a mechanical seal at one end, the driving screw is connected with a mechanical seal end cover at one end, and the mechanical seal is connected between the mechanical seal and the mechanical seal end cover.

[0012] Preferably, the outer wall of the positioning disc is uniformly distributed with a plurality of supporting plates, and one end of the supporting plate is fixedly connected to the inner side of the rear cover.

[0013] Preferably, the outer side of the screw pump is provided with a shell, the outer side of the driving screw is provided with a driven screw, the driven screw is arranged on the inner side of the shell, and one end of the driving screw is provided with a bearing.

[0014] A method for using the connecting structure of the main rod of the three-screw pump, comprising the following steps:

[0015] S1, first, the first limiting ring and the second limiting ring are connected to the first stabilizing sleeve and the second stabilizing sleeve at both ends of the stabilizing rod, and are respectively embedded in the inner side of the first limiting groove and the second limiting groove.

[0016] S2, then the first stabilizing sleeve and the second stabilizing sleeve are sleeved on one end of the driving screw, and the first limiting ring and the second limiting ring are tightly pressed on the outer wall of one end of the driving screw.

[0017] S3, the clamping block is connected to the middle part of the outer side of the stabilizing rod, and is fixedly connected to one end of the shell, and is connected through the clamping connection between the stabilizing rod and the clamping block.

[0018] S4, the other end of the driving screw is embeddedly connected with the positioning shaft through the connecting shaft, the outer side of the connecting shaft is embedded in the inner side of the positioning groove, and the positioning sleeve is sleeved, and the positioning disc and the supporting plate are fixedly connected to the inner side of the rear cover.

[0019] S5, the connection support of the main screw is supported by the stabilizing rod and the positioning disc, and the main screw is reinstalled on the inner side of the shell.

[0020] S6, then connect the front cover at one end of the shell, and connect the rear cover at both ends of the shell, the front cover and the rear cover are screwed to the quick release screw sleeve on the outer side by the quick release screw, and the quick release screw is connected to both ends of the shell to realize stable connection.

[0021] Compared with the prior art, the beneficial effects of the present application are:

[0022] 1. By arranging the stabilizing assembly, the first stabilizing sleeve and the second stabilizing sleeve at both ends of the stabilizing rod are connected with the first limiting ring and the second limiting ring, and are respectively embedded in the inner side of the first limiting groove and the second limiting groove, then the first stabilizing sleeve and the second stabilizing sleeve are sleeved on one end of the main screw, and the first limiting ring and the second limiting ring are pressed on the outer wall of one end of the main screw, the middle part of the outer side of the stabilizing rod is distributed with the clamping block, and the clamping block is fixedly connected to one end of the shell and connected between the stabilizing rod and the clamping block, so that the main screw is connected and supported by the first stabilizing sleeve and the second stabilizing sleeve, and the support force is further improved by the stabilizing rod, and the connecting shaft at one end of the main screw is connected with the positioning shaft, so that the connection mode of the main rod and the pump is increased, a connection structure for supporting the main rod is added at the connection between the pump and the main rod, and the carrying capacity of the main rod is also increased.

[0023] 2. By arranging the quick release assembly, the front cover is connected at one end of the shell, and the rear cover is connected at both ends of the shell, the front cover and the rear cover are screwed to the quick release screw sleeve on the outer side by the quick release screw, and the quick release screw is connected to both ends of the shell to realize stable connection, the connection structure for providing the support force of the main rod has a good disassembly structure, so that the main rod is convenient to disassemble and saves the space in the pump.

[0024] 3. The improved main rod structure increases the pump body leakage threshold pressure to some extent, improves the pump body performance, prolongs the service life of the pump body, and saves the use cost of the three-screw pump. The original main screw structure is simple, and the mechanical seal used in the straight connection type main rod structure can withstand a pump internal pressure value ≤1.0MPa, the mechanical seal used in the improved main screw structure can withstand a pump internal pressure value ≤3.0MPa, which is greatly improved, so that the loadable pressure of the pump is greatly increased, and the use range of the same type of three-screw pump is larger. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a three-dimensional structure diagram of a pump machine of a three-screw pump main rod connection structure.

[0026] Figure 2 Another angle structural diagram of the pump machine of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0027] Figure 3 An internal section view structural diagram of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0028] Figure 4 A main rod part structural perspective view of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0029] Figure 5 A stable assembly structural diagram of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0030] Figure 6 A main rod connecting piece structural diagram of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0031] Figure 7 A main rod connecting piece structural diagram of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0032] Figure 8 An installation assembly structural diagram of the connecting structure of the main rod of the three-screw rod pump of the present application;

[0033] Figure 9 Another angle structural diagram of the installation assembly of the connecting structure of the main rod of the three-screw rod pump of the present application.

[0034] In the figure:

[0035] 1, screw rod pump; 101, shell; 102, driving screw rod; 103, driven screw rod; 104, bearing; 105, mechanical seal end cover; 106, connecting shaft; 2, stable assembly; 201, stable rod; 202, first stable sleeve; 203, first limiting groove; 204, first limiting ring; 205, clamping block; 206, second stable sleeve; 207, second limiting groove; 208, second limiting ring; 209, positioning disc; 210, positioning sleeve; 211, positioning groove; 212, positioning shaft; 213, support plate; 214, positioning hole; 3, quick release assembly; 301, front cover; 302, bearing seat; 303, quick release screw sleeve; 304, quick release bolt; 305, mechanical seal; 306, rear cover. DETAILED DESCRIPTION

[0036] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0037] Embodiment 1

[0038] Please refer to Figures 1-9 The present application provides a technical solution: a connecting structure of a three-screw pump main rod, comprising a screw pump 1, the inner side of the screw pump 1 is provided with a driving screw 102, both ends of the driving screw 102 are connected with a stabilizing assembly 2, both ends of the screw pump 1 are provided with a quick-release assembly 3, one end of the driving screw 102 is connected with a stabilizing rod 201, one end of the stabilizing rod 201 is connected with a first stabilizing sleeve 202, the other end of the stabilizing rod 201 is provided with a second stabilizing sleeve 206, the first stabilizing sleeve 202 and the second stabilizing sleeve 206 are both sleeved on one end of the driving screw 102, the other end of the driving screw 102 is connected with a positioning disc 209, the side of the positioning disc 209 is connected with a positioning sleeve 210, the inner side of the positioning sleeve 210 is provided with a positioning groove 211, the side of the positioning disc 209 is connected with a positioning shaft 212, one end of the driving screw 102 is installed with a connecting shaft 106, one end of the connecting shaft 106 is provided with a positioning hole 214, one end of the positioning shaft 212 is connected with the inner side of the positioning hole 214, by connecting the first stabilizing sleeve 202 and the second stabilizing sleeve 206 at both ends of the stabilizing rod 201 with the first limiting ring 204 and the second limiting ring 208, and embedding them in the inner side of the first limiting groove 203 and the second limiting groove 207 respectively, then by sleeving the first stabilizing sleeve 202 and the second stabilizing sleeve 206 on one end of the driving screw 102, and pressing the first limiting ring 204 and the second limiting ring 208 on the outer wall of one end of the driving screw 102, the middle part of the outer side of the stabilizing rod 201 is distributed with a clamping block 205, and the clamping block 205 is fixedly connected to one end of the shell 101, and is clamped and connected between the stabilizing rod 201 and the clamping block 205, so as to facilitate the connection and support of the driving screw 102 by the first stabilizing sleeve 202 and the second stabilizing sleeve 206, and further improve the support force by the stabilizing rod 201, and the positioning shaft 212 is connected with the connecting shaft 106 at one end of the driving screw 102, so as to realize the connection mode of increasing the main rod and the pump machine, and increase the load bearing capacity of the main rod by increasing a connecting structure for supporting the main rod at the connection between the pump machine and the main rod.

[0039] As Figure 8 and Figure 9As shown, one end of the screw pump 1 is connected with the front cover 301, the other end of the screw pump 1 is provided with the rear cover 306, the outer side of the front cover 301 and the rear cover 306 is divided into a plurality of quick release screw sleeves 303, the inner side of the front cover 301 is provided with a bearing seat 302, the one end of the shell 101 is connected with the front cover 301, the two ends of the shell 101 are connected with the rear cover 306, the front cover 301 and the rear cover 306 are screwed to the quick release screw sleeves 303 on the outer side thereof through the quick release bolts 304, and the quick release bolts 304 are connected with the two ends of the shell 101, so that stable connection is realized, the connection structure providing the main rod supporting force has a good disassembly structure, so that the main rod is convenient to disassemble and the space in the pump is saved.

[0040] As shown in the Figure 5 two ends of the first stabilizing sleeve 202 are provided with first limiting grooves 203, the inner side of the first limiting groove 203 is connected with the first limiting ring 204, the middle part of the stabilizing rod 201 is provided with a clamping block 205, the outer side of the clamping block 205 is connected with the inner wall of one end of the screw pump 1, the first limiting groove 203 and the first limiting ring 204 are limited and connected, so that the limiting and fixing of the first stabilizing sleeve 202 is realized, so as to ensure the stability, and the first limiting ring 204 is loosened in the later period, so that the effect of quick disassembly is realized, and the clamping block 205 can provide effective clamping connection, and is convenient for disassembly work in the later period.

[0041] As shown in the Figure 5 two ends of the second stabilizing sleeve 206 are provided with second limiting grooves 207, the inner side of the second limiting groove 207 is connected with the second limiting ring 208, the second limiting ring 208 is sleeved on the outer wall of one end of the driving screw 102, and the second limiting groove 207 and the second limiting ring 208 can provide effective limiting and fixing, and are also convenient for disassembly work in the later period.

[0042] As shown in the Figure 8 the inner side of the quick release screw sleeve 303 is screwed with the quick release bolt 304, one end of the quick release bolt 304 is screwed on the two ends of the screw pump 1, and the quick release bolt 304 can conveniently realize the fixed connection of the front cover 301 and the rear cover 306, and the front and rear ends can be disassembled in the later period, so as to provide effective quick disassembly work.

[0043] As shown in the Figure 8 one end of the front cover 301 is fixedly connected with the mechanical seal 305, one end of the driving screw 102 is connected with the mechanical seal end cover 105, the mechanical seal 305 is connected between the mechanical seal 305 and the mechanical seal end cover 105, the mechanical seal 305 can provide the effect of mechanical seal, the connection of the mechanical seal 305 and the mechanical seal end cover 105 realizes the effect of high sealing connection, so as to improve the connection sealing property between the pump and the driving screw, and prolong the service life of the pump.

[0044] As shown in Figure 6 and Figure 7 shown, the outer wall of the positioning disc 209 is uniformly distributed with a plurality of supporting plates 213, one end of the supporting plate 213 is fixedly connected to the inner side of the rear cover 306, and the supporting effect is realized through the supporting plate 213, and the stability is improved.

[0045] As shown in Figure 3 shown, the outer side of the screw pump 1 is provided with a shell 101, the outer side of the driving screw 102 is provided with a driven screw 103, the driven screw 103 is arranged on the inner side of the shell 101, one end of the driving screw 102 is provided with a bearing 104, the shell 101 can provide protection and installation effect outside, the driven screw 103 can provide driven transmission effect, and the bearing 104 can provide rotation auxiliary effect, so as to realize the complete transmission effect of the pump main rod.

[0046] A method for using a three-screw pump main rod connecting structure, comprising the following steps:

[0047] S1, first, the first stabilizing sleeve 202 and the second stabilizing sleeve 206 at both ends of the stabilizing rod 201 are connected with the first limiting ring 204 and the second limiting ring 208, and are respectively embedded in the inner side of the first limiting groove 203 and the second limiting groove 207.

[0048] S2, then the first stabilizing sleeve 202 and the second stabilizing sleeve 206 are sleeved on one end of the driving screw 102, and the first limiting ring 204 and the second limiting ring 208 are pressed on the outer wall of one end of the driving screw 102.

[0049] S3, the middle part of the outer side of the stabilizing rod 201 is connected with the clamping block 205, and the clamping block 205 is fixedly connected to one end of the shell 101, and is clamped and connected between the stabilizing rod 201 and the clamping block 205.

[0050] S4, the other end of the driving screw 102 is embedded and connected with the positioning shaft 212 through the connecting shaft 106, the outer side of the connecting shaft 106 is embedded in the inner side of the positioning groove 211, and the positioning sleeve 210 is sleeved, and the positioning disc 209 and the supporting plate 213 are fixedly connected to the inner side of the rear cover 306.

[0051] S5, the driving screw 102 is connected and supported by the stabilizing rod 201 and the positioning disc 209, and is installed in the inner side of the shell 101.

[0052] S6, then through the connection of the shell 101 one end with the front cover 301, and through the rear cover 306 at both ends of the shell 101, the front cover 301 and the rear cover 306 are both threaded to the quick release screw sleeve 303 outside by the quick release screw bolt 304, and the quick release screw bolt 304 is connected with both ends of the shell 101, realizing stable connection.

[0053] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications to the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to part of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A connecting structure of a main shaft of a triple screw pump, comprising a screw pump (1), characterized in that: The inner side of the screw pump (1) is provided with a driving screw (102), both ends of the driving screw (102) are connected with a stabilizing assembly (2), both ends of the screw pump (1) are provided with a quick release assembly (3); One end of the driving screw (102) is connected with a stabilizing rod (201), one end of the stabilizing rod (201) is connected with a first stabilizing sleeve (202), the other end of the stabilizing rod (201) is provided with a second stabilizing sleeve (206), the first stabilizing sleeve (202) and the second stabilizing sleeve (206) are sleeved on one end of the driving screw (102), the middle part of the stabilizing rod (201) is provided with a clamping block (205), the outer side of the clamping block (205) is connected with the inner wall of one end of the screw pump (1). The other end of the driving screw (102) is connected with a positioning disc (209), the side surface of the positioning disc (209) is connected with a positioning sleeve (210), the inner side of the positioning sleeve (210) is provided with a positioning groove (211), the side surface of the positioning disc (209) is connected with a positioning shaft (212), one end of the driving screw (102) is provided with a connecting shaft (106), one end of the connecting shaft (106) is provided with a positioning hole (214), one end of the positioning shaft (212) is connected with the inner side of the positioning hole (214), the outer wall of the positioning disc (209) is uniformly provided with a plurality of supporting plates (213), one end of the supporting plate (213) is fixedly connected with the inner side of the rear cover (306).

2. The connection structure of the three-screw-pump main shaft according to claim 1, characterized in that: One end of the screw pump (1) is connected with a front cover (301), the other end of the screw pump (1) is provided with a rear cover (306), the outer side of the front cover (301) and the rear cover (306) is divided into a plurality of quick release screw sleeves (303), the inner side of the front cover (301) is provided with a bearing seat (302).

3. The connection structure of the three-screw-pump main shaft according to claim 1, characterized in that: Both ends of the first stabilizing sleeve (202) are provided with first limiting grooves (203), the inner side of the first limiting groove (203) is connected with a first limiting ring (204).

4. The connection structure of the three-screw-pump main shaft according to claim 1, characterized in that: Both ends of the second stabilizing sleeve (206) are provided with second limiting grooves (207), the inner side of the second limiting groove (207) is connected with a second limiting ring (208), the second limiting ring (208) is sleeved on the outer wall of one end of the driving screw (102).

5. The connecting structure of the three-screw-pump main shaft according to claim 2, characterized in that: The inner side of the quick release screw sleeve (303) is threadedly connected with a quick release screw (304), one end of the quick release screw (304) is threadedly connected with both ends of the screw pump (1).

6. The connecting structure of the three-screw-pump main shaft according to claim 2, characterized in that: One end of the front cover (301) is fixedly connected with a mechanical seal (305), one end of the driving screw (102) is connected with a mechanical seal end cover (105), the mechanical seal (305) and the mechanical seal end cover (105) are connected.

7. The connecting structure of the tri-screw pump main shaft according to claim 1, characterized in that: The outer side of the screw pump (1) is provided with a shell (101), the outer side of the driving screw (102) is provided with a driven screw (103), the driven screw (103) is arranged on the inner side of the shell (101), one end of the driving screw (102) is provided with a bearing (104).

8. A method of connecting the connection structure of the main shaft of a triple screw pump according to any one of claims 1 to 7, characterized by, The method comprises the following steps: S1, first, by connecting the first and second stabilizing sleeves (202 and 206) at both ends of the stabilizing rod (201) with the first and second limiting rings (204 and 208), and embedding them in the inner sides of the first and second limiting grooves (203 and 207); S2, then by fitting the first and second stabilizing sleeves (202 and 206) on one end of the driving screw (102), and pressing the first and second limiting rings (204 and 208) against the outer wall of one end of the driving screw (102); S3, the middle part of the outer side of the stabilizing rod (201) is connected with the clamping block (205), which is fixedly connected to one end of the shell (101), and is clamped and connected between the stabilizing rod (201) and the clamping block (205); S4, the other end of the driving screw (102) is embeddedly connected with the positioning shaft (212) through the connecting shaft (106), the outer side of the connecting shaft (106) is embedded in the inner side of the positioning groove (211), and the positioning sleeve (210) is sleeved, and the positioning disc (209) and the supporting plate (213) are fixedly connected to the inner side of the rear cover (306); S5, the driving screw (102) is connected and supported by the stabilizing rod (201) and the positioning disc (209), and is installed in the inner side of the shell (101); S6, then by connecting one end of the shell (101) with the front cover (301), and connecting the other end of the shell (101) with the rear cover (306), the front cover (301) and the rear cover (306) are threadedly connected to the quick release screw sleeve (303) on the outer side thereof through the quick release screw bolt (304), and the quick release screw bolt (304) is connected to the two ends of the shell (101), realizing stable connection.

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