Vertical barrel pump

Abstract

The utility model relates to the technical field of shield pumps, in particular to a vertical barrel pump. The barrel pump comprises an outer barrel, a flange cover is installed at the upper end of the outer barrel, a liquid inlet pipe is installed on the flange cover, one end of the liquid inlet pipe is located outside the outer barrel, the other end of the liquid inlet pipe is located inside the outer barrel, a pump body and a motor connected with the pump body are arranged in the outer barrel, and a suction inlet is formed in the lower end of the pump body. A first liquid outlet and a second liquid outlet are formed in the two sides of the pump body respectively, the first liquid outlet is connected with a first liquid outlet pipe, the second liquid outlet is connected with a second liquid outlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are connected with a liquid outlet header pipe, the liquid outlet header pipe is arranged above the motor, and the first liquid outlet pipe and the second liquid outlet pipe are connected with the liquid outlet header pipe in a staggered mode. The upper end of the liquid outlet header pipe penetrates through the flange cover and extends out of the outer cylinder. The double-outlet volute design is adopted, flow is divided into two parts to be discharged, an original asymmetric volute flow channel is adjusted to be symmetrically arranged, and operation is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of shielded pumps, in particular to a vertical barrel bag pump. Background Art

[0002] The barrel pump is a common centrifugal pump, also known as a bag pump or a bag centrifugal pump. It is a commonly used industrial pump designed for easily gasified media and can be used to transport a variety of liquids of different properties. Barrel pumps are usually buried underground, easy to keep cold, easy to maintain, long service life, and have high anti-cavitation performance. They are widely used in petrochemical, pharmaceutical, food and other industries.

[0003] At present, the common shielded barrel bag pumps on the market are generally divided into single-stage pumps and multi-stage pumps. Single-stage pumps are mostly used in situations with low head. If the head is high, the single-stage pump will increase the diameter of the impeller, thereby increasing the volute and the size of the outer barrel accordingly, which will increase the manufacturing cost a lot. In this case, a multi-stage pump is generally used to reduce the radial size, but the axial size will also increase, and the stability of the pump will also decrease. In addition, the existing pump drainage device uses a pump suction method to suck out the solution inside the barrel. This method has a poor emptying effect and is prone to solution residue, which is not conducive to the later operation and maintenance of the equipment.

[0004] The Chinese patent application number is 201620132224.2, which discloses a single-stage barrel canned pump, including a pump body and a motor connected to the pump body, the motor is connected to a junction box, the pump body, the motor and the junction box are installed on the inner side of the barrel, one end of the medium inlet pipe is connected to the pump inlet on the pump body through the inner cavity of the barrel, the other end of the medium inlet pipe is located outside the barrel, the medium outlet on the pump body is connected to one end of the medium discharge pipe, the other end of the medium discharge pipe is located outside the barrel; the junction box is connected to the outside of the barrel through a pipeline. The barrel canned pump has a simple structure, ingenious design, and reasonable layout. It is not only low in cost, but also ensures safe production. However, it adopts a single-stage pump form, and the volute with a single outlet is relatively wide on the flow channel outlet side, which will enlarge the diameter of the outer cylinder, thereby increasing the overall size and increasing the cost. In addition, its symmetry is not very good, and it is easy to produce radial swing, which may cause rotor locking and pump vibration. Utility Model Content

[0005] The purpose of the utility model is to solve the technical problems that the single outlet structure of the existing barrel bag shielded pump is wider on the outlet side of the flow channel, which leads to an increase in the overall size of the pump and is prone to radial swing, causing rotor locking and pump vibration. A vertical barrel bag pump is provided, and the volute included in the pump head part adopts the design of a double-outlet double-channel single-stage pump volute, which evenly divides the flow into two parts for discharge, and adjusts the originally asymmetric volute flow channel into an overall centrally symmetrical arrangement structure, so that the overall symmetry is better, the operation is more stable, and the vibration of the pump body can be effectively avoided.

[0006] The utility model adopts the following technical scheme to achieve the above-mentioned purpose: a vertical barrel bag pump, comprising an outer barrel, a flange cover is installed on the upper end of the outer barrel, a liquid inlet pipe is installed on the flange cover, one end of the liquid inlet pipe is located outside the outer barrel, and the other end of the liquid inlet pipe is located inside the outer barrel, a pump body and a motor connected to the pump body are arranged in the outer barrel, a suction port is arranged at the lower end of the pump body, a first liquid outlet and a second liquid outlet are arranged on both sides of the pump body, the first liquid outlet is connected to a first liquid outlet pipe, the second liquid outlet is connected to a second liquid outlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are connected to a liquid outlet main pipe respectively, the liquid outlet main pipe is vertically arranged above the motor, the first liquid outlet pipe and the second liquid outlet pipe are connected to the liquid outlet main pipe in an up-and-down staggered manner, and the upper end of the liquid outlet main pipe passes through the flange cover and extends out of the outer barrel.

[0007] Furthermore, the first liquid outlet pipe is connected to the lower end of the liquid outlet main pipe, and the second liquid outlet pipe is connected to the upper end of the liquid outlet main pipe.

[0008] Furthermore, the first liquid outlet pipe is connected to the upper end of the liquid outlet main pipe, and the second liquid outlet pipe is connected to the lower end of the liquid outlet main pipe.

[0009] Furthermore, the motor is connected to a junction box via a junction tube, and the junction box is installed on the upper end of the flange cover.

[0010] Furthermore, a residual liquid discharge pipe is inserted into the flange cover, one end of the residual liquid discharge pipe is located outside the outer cylinder, and the other end of the residual liquid discharge pipe is located at the inner bottom end of the outer cylinder. A nitrogen inlet is provided on the flange cover.

[0011] Furthermore, a liquid level gauge is provided on the flange cover.

[0012] Furthermore, the flange cover is also provided with a lifting lug.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] (1) The utility model vertical barrel bag pump, the volute included in the pump head part adopts the design of a double-outlet double-channel single-stage pump volute, the flow is evenly divided into two parts for discharge, and the originally asymmetric volute flow channel is adjusted to an overall centrally symmetrical arrangement structure, the overall symmetry of the pump is better, thereby effectively avoiding the vibration of the pump body, and the operation is more stable and reliable.

[0015] (2) The utility model vertical barrel bag pump avoids the design of a multi-stage pump, shortens the axial length, and adopts a double outlet in the pump head part, which reduces the radial dimension of the pump body, improves the utilization rate of the internal space of the outer barrel, makes the structure more compact, reduces the overall size, and saves manufacturing costs.

[0016] (3) In the vertical barrel bag pump of the utility model, the first liquid outlet pipe and the second liquid outlet pipe are connected to the liquid outlet main pipe in an alternating manner, which can avoid the collision of the two liquid flows when entering the liquid outlet main pipe, thereby facilitating the transportation of the liquid.

[0017] (4) The vertical barrel bag pump of the utility model is provided with a nitrogen inlet and a residual liquid discharge pipe, so that when the pump is stopped for maintenance, the residual liquid in the outer barrel can be better discharged, thereby facilitating the maintenance work of the pump body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the structural diagram of the vertical barrel bag pump of the utility model.

[0019] Figure 2 for Figure 1 AA section view.

[0020] Figure 3 The overall cross-sectional structure of the vertical barrel pump of the utility model is shown in FIG. Figure 1 .

[0021] Figure 4 The overall cross-sectional structure of the vertical barrel pump of the utility model is shown in FIG. Figure 2 .

[0022] In the figure: 1. pump body, 101. suction port, 102. first liquid outlet, 103. second liquid outlet, 104. first flow channel, 105. second flow channel, 2. motor, 3. first liquid outlet pipe, 4. second liquid outlet pipe, 5. liquid outlet main pipe, 6. outer cylinder, 7. flange cover, 8. junction box, 9. liquid inlet pipe, 10. sealing ring, 11. liquid level meter, 12. lifting ear, 13. wiring pipe, 14. residual liquid discharge pipe, 15. nitrogen inlet. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the specific embodiments.

[0024] like Figure 1-4A vertical barrel bag pump shown in the figure comprises an outer barrel 6, a flange cover 7 is installed at the upper end of the outer barrel 6, a sealing ring 10 is arranged between the outer barrel 6 and the flange cover 7, so that a closed space is formed inside the outer barrel 6 to prevent leakage, a liquid inlet pipe 9 is installed on the flange cover 7, one end of the liquid inlet pipe 9 is located outside the outer barrel 6, and the other end of the liquid inlet pipe 9 is located inside the outer barrel 6, a liquid level meter 11 and a lifting lug 12 are also arranged on the flange cover 7, and the liquid level meter 11 extends into the outer barrel 6 to detect the liquid level of the outer barrel 6; a pump body 1 and a motor 2 connected to the pump body 1 are arranged in the outer barrel 6, the motor 2 is connected to a junction box 8 through a wiring tube 13, and the junction box 8 is installed at the upper end of the flange cover 7 for installing a power cable to prevent the cable from contacting the liquid; a suction port 101 is arranged at the lower end of the pump body 1, and first liquid outlets 10 are arranged on both sides of the pump body 1 2 and a second liquid outlet 103, the first liquid outlet 102 is connected to the first liquid outlet pipe 3, the second liquid outlet 103 is connected to the second liquid outlet pipe 4, the first liquid outlet pipe 3 and the second liquid outlet pipe 4 are respectively connected to the liquid outlet main pipe 5, the liquid outlet main pipe 5 is vertically arranged above the motor 2, the upper end of the liquid outlet main pipe 5 passes through the flange cover 7 and extends out of the outer cylinder 6, the first liquid outlet pipe 3 and the second liquid outlet pipe 4 are connected to the liquid outlet main pipe 5 in an up-and-down staggered manner, specifically, the first liquid outlet pipe 3 is connected to the lower end of the liquid outlet main pipe 5, the second liquid outlet pipe 4 is connected to the upper end of the liquid outlet main pipe 5, or the first liquid outlet pipe 3 is connected to the upper end of the liquid outlet main pipe 5, the second liquid outlet pipe 4 is connected to the lower end of the liquid outlet main pipe 5 (not shown in the figure), the first liquid outlet pipe 3 and the second liquid outlet pipe 4 are staggeredly connected to the liquid outlet main pipe 5, which can avoid the two liquid flows from forming a collision when entering the liquid outlet main pipe 5, and facilitate the transportation of liquid.

[0025] A residual liquid discharge pipe 14 is inserted into the flange cover 7, one end of the residual liquid discharge pipe 14 is located outside the outer tube 6, and the other end of the residual liquid discharge pipe 14 is located at the inner bottom end of the outer tube 6. A nitrogen inlet 15 is provided on the flange cover 7. By providing the residual liquid discharge pipe 14 and the nitrogen inlet 15, when the pump is stopped for maintenance, the residual liquid in the outer tube 6 can be better discharged, which facilitates the maintenance of the pump body.

[0026] The working principle of the utility model vertical barrel bag pump is as follows: most of the outer barrel 6 is buried underground, which plays a role in reducing the installation height, thereby reducing the NPSH of the whole pump. The liquid enters the closed space inside the outer barrel 6 from the liquid inlet pipe 9 on the flange cover 7 and fills the entire outer barrel 6. The liquid level completely immerses the pump body 1, the motor 2, the first liquid outlet pipe 3, the second liquid outlet pipe 4 and the liquid outlet main pipe 5. The liquid level meter 11 can detect whether the liquid is full. When the shielded barrel bag pump is running, the liquid is sucked into the pump from the suction port 101 of the pump body 1, and the power is provided by the motor 2. After the liquid is pressurized, it flows through the first flow channel 104 and the second flow channel 105 respectively, and is discharged from the first liquid outlet 102 and the second liquid outlet 103 to the first liquid outlet pipe 3 and the second liquid outlet pipe 4 respectively, and then the liquid flows merge into the liquid outlet main pipe 5, and finally discharged from the liquid outlet main pipe to the outside of the pump.

[0027] The utility model discloses a vertical barrel bag pump, the pump head part does not adopt the volute form of a conventional single-stage shielded pump, but adopts a double-outlet double-channel design, the flow is evenly divided into two parts for discharge, and the originally asymmetric volute channel is adjusted to an overall centrally symmetrical arrangement structure, the overall symmetry of the pump is better, thereby effectively avoiding the vibration of the pump body, and the operation is more stable and reliable, and at the same time avoids the design of a multi-stage pump, thereby shortening the axial length. In addition, the pump head part adopts a double-outlet structure, the radial size of the pump body is reduced, the utilization rate of the internal space of the outer cylinder is improved, the structure is more compact, the overall size is reduced, and the manufacturing cost is saved.

[0028] The above contents are further detailed descriptions of the utility model in combination with the preferred technical solutions, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, simple deductions and substitutions can be made without departing from the concept of the utility model, which should be regarded as the protection scope of the utility model.

Claims

1. A vertical barrel pump, characterized in that: It includes an outer cylinder, a flange cover is installed on the upper end of the outer cylinder, a liquid inlet pipe is installed on the flange cover, one end of the liquid inlet pipe is located outside the outer cylinder, and the other end of the liquid inlet pipe is located inside the outer cylinder, a pump body and a motor connected to the pump body are arranged in the outer cylinder, a suction port is arranged at the lower end of the pump body, a first liquid outlet and a second liquid outlet are respectively arranged on both sides of the pump body, the first liquid outlet is connected to a first liquid outlet pipe, the second liquid outlet is connected to a second liquid outlet pipe, the first liquid outlet pipe and the second liquid outlet pipe are respectively connected to a liquid outlet main pipe, the liquid outlet main pipe is vertically arranged above the motor, the first liquid outlet pipe and the second liquid outlet pipe are connected to the liquid outlet main pipe in an up-and-down staggered manner, and the upper end of the liquid outlet main pipe passes through the flange cover and extends out of the outer cylinder.

2. A vertical barrel pump according to claim 1, characterized in that: The first liquid outlet pipe is connected to the lower end of the liquid outlet main pipe, and the second liquid outlet pipe is connected to the upper end of the liquid outlet main pipe.

3. A vertical barrel pump according to claim 1, characterized in that: The first liquid outlet pipe is connected to the upper end of the liquid outlet main pipe, and the second liquid outlet pipe is connected to the lower end of the liquid outlet main pipe.

4. A vertical barrel pump according to claim 1, characterized in that: The motor is connected to a junction box via a junction tube, and the junction box is installed on the upper end of the flange cover.

5. A vertical barrel pump according to claim 1, characterized in that: A residual liquid discharge pipe is inserted on the flange cover, one end of the residual liquid discharge pipe is located outside the outer cylinder, and the other end of the residual liquid discharge pipe is located at the inner bottom end of the outer cylinder. A nitrogen inlet is provided on the flange cover.

6. A vertical barrel pump according to claim 1, characterized in that: A liquid level gauge is arranged on the flange cover.

7. A vertical barrel pump according to claim 1, characterized in that: The flange cover is also provided with a lifting lug.

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