Double-seal cloth-clamping type plunger pump

Abstract

The utility model relates to a double-seal cloth clamping type plunger pump, which provides a pump body with a double-layer sealing structure, a stable upper pump body frame, a stable lower pump body frame, a combined sealing layer, a plunger sealing water ring, a Y-shaped cloth clamping seal and entering high-pressure liquid to form double-layer sealing. The two vertical hook head vertical plates and the two transverse oil cylinder fixing plates are connected into a square frame through the bolts and the hook head pressing plates, a stable upper pump body frame and a stable lower pump body frame are formed, the advantages of being stable in structure, flexible in conception, capable of saving materials and the like are achieved, the maintenance cost is reduced, the working environment is optimized, and the production efficiency of enterprises is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of plunger pumps and relates to an improvement of the ceramic plunger seal and assembly structure of a cloth-clamped plunger pump. Background Art

[0002] The plunger pump is an important power source. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of compact structure, high efficiency and convenient flow regulation.

[0003] Piston pumps are widely used in situations where high pressure, large flow and flow regulation are required. They are a typical positive displacement hydraulic machine that is driven by a prime mover. They convert the input mechanical energy into liquid pressure energy, which is then input into the system in the form of pressure and flow. They are the power source of the hydraulic system. Since they can transport liquids under high pressure, they are widely used in various industries in industrial production and daily life.

[0004] The existing plunger pump is a vertical structure, in which the ceramic plunger is connected to the piston rod of the external oil cylinder. The two are supported by two round steel plates arranged at the bottom of the oil cylinder and the pump body as the top cover and the base, and are supported by a number of sparse columns in the middle. The columns are subject to limited pressure. When the pressure of the external oil cylinder is increased, the columns are insufficiently rigid and easily bend and deform, and even the connecting bolts may crack, posing a hidden danger to on-site production safety. The bent columns seriously affect the balance of the ceramic plunger. Secondly, the performance of the pump body sealing mechanism does not meet the standards. After the pump has been used for a period of time, material splashing and overflowing often occur at the connection seal. Firstly, material is wasted and the accurate measurement of the material delivery volume is affected. Secondly, the splashing material brings inconvenience to on-site work and causes pollution to the on-site working environment. Thirdly, irregular splashing requires replacement of seals, reducing production efficiency. Utility Model Content

[0005] The purpose of the utility model is to overcome the above defects, solve the corresponding technical problems, and provide a double-sealed pump body structure and stable upper and lower pump body frames, which ensure the safety of workers when working, not only reduce material waste, but also improve the production efficiency of the enterprise.

[0006] The technical solution adopted by the utility model to solve the above-mentioned technical problems is: a double-sealed cloth-clamped plunger pump, characterized in that the pump body innovatively uses a double-layer seal, the main principle is to use a combined sealing layer + plunger sealing water ring and a Y-shaped cloth-clamped seal to form a double-layer seal, wherein the combined sealing layer is a first-layer sealing structure, and the plunger sealing water ring and the Y-shaped cloth-clamped seal are a second-layer sealing structure, but at the same time, the high-pressure liquid must enter the position flush with the plunger sealing water ring, and the pressure of the high-pressure liquid must be greater than the material pressure to ensure the tightness of the second-layer sealing structure; the high-pressure liquid inlet and outlet are flush with the plunger sealing water ring, embedded in the cylinder body, and the two ports are symmetrically arranged, and the high-pressure liquid enters and flows out from the inlet and outlet; a plurality of sparse columns are transformed into two symmetrical and thick hook-head vertical plates, which are connected by a hook-head pressure plate and bolts with a cylinder fixing plate to form a stable and solid "mouth"-shaped frame, the upper end of which receives an external hydraulic cylinder, and the lower end of which receives an upper and lower pump body, thereby forming a pump body frame.

[0007] Furthermore, the specific structure of the double-layer sealed pump body is as follows: a layer of packing is arranged at the bottom of the upper pump body, and adjacent to the packing are three groups of sealing layers, each of which is composed of (support ring + Y-type clamping cloth), so that three groups are stacked in sequence to form a triple seal, which constitutes the first layer of the double sealing structure; the second layer is mainly composed of a plunger sealing water ring, and Y-type clamping cloth is arranged on the upper and lower surfaces adjacent to the plunger sealing water ring, and high-pressure liquid inlet and outlet are symmetrically inlaid in the center of the plunger sealing water ring, and the pressure of the liquid inlet must be greater than the pressure of the material inlet, so that even if the first layer of seal is damaged, under the action of the second layer of high-pressure liquid, the material pressure is less than the liquid pressure, and the material will not overflow or splash outward, forming a second layer of high-pressure seal; in summary, the combined sealing layer + plunger sealing water ring + high-pressure liquid injected flush with the plunger sealing water ring constitutes a double seal of the pump body, and realizes the double sealing performance of the pump body.

[0008] Furthermore, the two vertical hook plates and the two horizontal cylinder fixing plates are connected by bolts and hook pressure plates to form a "mouth" shaped square frame. The structure is stable and not easy to deform. It provides the upper support for the external hydraulic cylinder and connects the upper and lower pump bodies at the bottom. Such a frame provides the basic conditions for stabilizing the pump body; the balance of the ceramic plunger connected to the piston rod is no longer affected by the fixed frame and will not tilt, and the double-sealed pump body is stably fixed on the cylinder fixing plate.

[0009] The utility model provides a double-sealed cloth-clamped plunger pump, which has the advantages of stable structure, flexible design, material saving, etc., reduces maintenance costs, optimizes the working environment, and improves enterprise production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model is a double-sealed cloth-inserted plunger pump double-sealed structure principle schematic diagram.

[0011] Figure 2 The utility model is a schematic diagram of the assembly of a hook head vertical plate, a hook head pressure plate and bolts of a double-sealed cloth-reinforced plunger pump.

[0012] Figure 3 The utility model is a schematic diagram of the assembly of a double-sealed cloth-reinforced plunger pump.

[0013] Figure 4 The utility model is a schematic diagram of the assembly of a double-sealed cloth-clamped plunger pump support ring and a Y-shaped cloth-clamped piston pump.

[0014] Figure 5 The utility model is a schematic diagram of the assembly of a plunger sealing water ring and a Y-shaped cloth clamping type plunger pump with double sealing.

[0015] Figure numerals: 1-inlet and outlet connecting flange, 2-lower pump body, 3-ceramic plunger, 4-hook vertical plate, 5-cylinder fixing plate, 6-external hydraulic cylinder, 7-oil pipe, 8-return plate, 9-piston rod, 30-cylinder body, 31-packing, 32-Y-type cloth-clamped combined sealing layer (first sealing layer), 33-plunger sealing water ring, 34-high-pressure liquid inlet and outlet, 35-drainage hole, 36-Y-type cloth-clamped, 37-support ring, 41-hook pressure plate. Specific implementation plan

[0016] The following is a description of the technical solution in the embodiment of the utility model in conjunction with the drawings of the embodiment of a double-sealed cloth-inserted plunger pump of the utility model. The described embodiment is only a part of the preferred embodiments of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments without creativity made by those skilled in the art belong to the protection scope of the utility model. Example

[0017] The material enters from the feed port connection flange 1, passes through the conversion of the upper and lower pump bodies and the one-way valve, and finally is discharged from the discharge port connection flange. In this process, the upper and lower pump bodies and the one-way valve play a major role. The specific structure of the upper and lower pump bodies is as follows: the lower pump body 2 and the upper pump body are combined into a pump body, the lower pump body has a built-in one-way valve, and the upper pump body is fixed on the cylinder fixing plate 5; the piston rod of the external hydraulic cylinder 6 is connected to the ceramic plunger 3, and the hydraulic oil is sucked in and discharged by the external hydraulic cylinder 6 to drive the piston rod 9 to move up and down. The piston rod 9 is connected to the ceramic plunger 3, so as the piston rod moves, the ceramic plunger 6 rises and falls in the pump body. In this process, the piston rod drives the ceramic plunger to rise, the material is sucked from the feed port connection flange, the feed one-way valve is opened, and the material is filled under the ceramic plunger 3; the piston rod drives the ceramic plunger to descend, the feed one-way valve is closed, the discharge one-way valve is opened, and the material is discharged from the discharge port connection flange, and this cycle is repeated to complete the entry and discharge of the material.

[0018] The two hook head upright plates 4 and the two cylinder fixing plates 5 are connected with bolts through the hook head pressure plate 41 to form an "I"-shaped frame with a stable structure; viewed from the front, the hook head upright plates 4 look like an "I"-shaped steel plate with widened ribs, erected on both sides of the upper pump body, and its height is slightly longer than the length of the piston rod, which is convenient for the rise and fall of the ceramic plunger; the external hydraulic cylinder 6 realizes the up and down movement of the piston rod through the oil inlet and outlet of the oil pipe 7; when the ceramic plunger rises to the maximum height and hits the return plate 8, the ceramic plunger can no longer rise, and an electrical signal is given, and the plunger immediately enters the descending program, and the return plate 8 plays a role in preventing the ceramic plunger from continuing to move up.

[0019] The double sealing principle of the plunger pump is as follows: a layer of packing 31 is laid in the cylinder 30 at the bottom of the upper pump body, and three groups of sealing layers are arranged next to the packing, each layer is composed of a support ring 37 + a Y-shaped sandwich cloth 36, and three groups are stacked in sequence to form a sealing layer, forming a Y-shaped sandwich cloth combined sealing layer 32, i.e., the first layer of the double sealing structure; the second layer is mainly composed of a plunger sealing water ring 33, and Y-shaped sandwich cloth 36 is arranged on both the upper and lower surfaces of the plunger sealing water ring 33, so that the sealing performance of the plunger sealing water ring is better, and the high-pressure liquid inlet and outlet 34 are symmetrically inlaid in the center of the plunger sealing water ring, and the high The pressure at the liquid inlet must be greater than the pressure at the material inlet, so that even if the first layer of seal is damaged, under the action of the second layer of high-pressure liquid, the material pressure is less than the liquid pressure, and the material will not overflow or splash outward, forming a second layer of high-pressure seal; the drainage hole 35 is arranged on the upper pump body above the high-pressure liquid inlet. If part of the high-pressure liquid seeps out, the drainage hole is required to divert it out; it can be seen that the combined sealing layer, the plunger sealing water ring, the high-pressure liquid inlet and outlet ports embedded flush with the plunger sealing water ring, the injected high-pressure liquid, the drainage hole, etc. are all indispensable conditions for achieving double sealing of the pump body.

Claims

1. A double-sealed cloth-inserted plunger pump, comprising a double-layer sealing structure and upper and lower pump body frames, characterized in that: A combined sealing layer + plunger sealing water ring and Y-type cloth sealing are used to form a double-layer seal; the specific structure of the double-layer sealed pump body is as follows: a layer of packing is arranged at the bottom of the upper pump body, and a combined sealing layer is arranged next to the packing, and each layer is composed of a support ring + Y-type cloth. Three groups are stacked in sequence to form the first layer of the double sealing structure; the second layer is mainly composed of a plunger sealing water ring, and Y-type cloth is arranged on the upper and lower surfaces close to the plunger sealing water ring, and high-pressure liquid inlet and outlet ports are symmetrically inlaid in the center of the plunger sealing water ring, and the pressure at the liquid inlet is greater than the pressure at the material inlet.

2. A double-sealed cloth-inserted plunger pump according to claim 1, characterized in that: The upper and lower pump body frames are composed of two vertical hook plates and two horizontal cylinder fixing plates connected by bolts and hook pressure plates to form an "O" shaped square frame. The hook plates are like an "I" shaped steel plate with widened ribs, and their height is longer than the length of the piston rod.

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