Improved oil way system of reciprocating metering pump

Abstract

The utility model relates to a design structure of a metering pump, in particular to an improved oil way system of a reciprocating metering pump, which comprises a pump body plunger, the pump body plunger is arranged in an external cylinder body in a penetrating manner, a cylinder cover is arranged at the end part of the cylinder body positioned at one end of the pump body plunger, and the cylinder cover comprises an inlet valve and an outlet valve of the pump from bottom to top, a plunger gland is arranged at the other end of the pump body plunger; a safety valve is arranged at the upper end of the cylinder body; a pump cavity oil pool is arranged on the side close to the plunger gland, an oil discharging pipe is led out of the side end of the safety valve and led to the upper portion of the pump cavity oil pool, and an oil supplementing pipe is led out of the lower portion of the oil supplementing valve and connected to the bottom of the pump cavity oil pool. The oil way operation mode brought by the oil way structure can solve the problems that the abrasion condition of the plunger and the filler is relieved, and the replacement period of spare parts is prolonged; lubrication of the plunger in the operation period is improved; and meanwhile, the oil way is externally arranged, so that the operation state of the oil way of the operation machine pump can be conveniently checked.

Description

Technical Field

[0001] The utility model relates to a design structure of a metering pump, in particular to an improved reciprocating metering pump oil circuit system, belonging to the technical field of metering pumps. Background Art

[0002] The use of metering pumps is selected according to their types and application fields. For the water injection pump of the desorbent water injection system of the adsorption tower in the chemical joint aromatics unit, the pump plunger is very easy to wear, and maintenance and spare parts replacement are frequent.

[0003] The existing metering pump plunger uses graphite packing seal during operation. The packing is tightly fastened, the plungers rub against each other dryly, the plungers are easy to wear, the spare parts are frequently replaced, and the spare parts replacement cycle is extended. Utility Model Content

[0004] In view of the above-mentioned problems that the plunger of the metering pump is very easy to wear and maintenance and spare parts replacement are frequent, the purpose of the utility model is to provide an improved reciprocating metering pump oil circuit system to reduce the wear of the plunger and packing. The oil circuit operation mode increases the lubrication of the plunger during operation and reduces wear.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an improved reciprocating metering pump oil circuit system, comprising: a pump body plunger, the pump body plunger is inserted into an external cylinder body, a cylinder head is provided at the cylinder end at one end of the pump body plunger, the cylinder head includes an inlet valve and an outlet valve of the pump from bottom to top, respectively, and a plunger gland is provided at the other end of the pump body plunger; a safety valve is provided at the upper end of the cylinder body, and an oil replenishing valve is provided at the lower end; a pump chamber oil pool is provided near one side of the plunger gland, an oil unloading pipe is led out from the side end of the safety valve and led to the upper part of the pump chamber oil pool, and an oil replenishing pipe is led out from the lower part of the oil replenishing valve and connected to the bottom of the pump chamber oil pool;

[0006] Furthermore, the oil unloading pipe is a right-angle elbow, one end of which is fixedly connected to the safety valve, and the other end of the pipe head extends into the top of the oil pool in the pump chamber;

[0007] Furthermore, the oil replenishment pipe is a double elbow pipe, one end of which is fixedly connected to the bottom of the oil replenishment valve, and the other end of the pipe head extends into the bottom of the oil pool of the pump chamber;

[0008] Furthermore, the distance between the highest point of the oil supply pipe extending into the oil pool of the pump chamber and the upper plane of the bottom of the oil pool of the pump chamber is set to 1 cm to prevent impurities from clogging the oil supply pipe during operation;

[0009] Furthermore, the end of the oil unloading pipe extending to the pump chamber oil pool corresponds to the point where the pump chamber oil pool is located and is located on the same vertical line as the end of the oil replenishing pipe extending to the pump chamber oil pool.

[0010] In the oil circuit system with the above structure, the safety valve oil unloading pipe is led to the upper part of the pump chamber. When the safety valve is tripped, the oil level is higher than the oil unloading pipe port, and the hydraulic oil is discharged from the oil unloading pipe to the pump chamber oil pool; the oil replenishing pipe is led from the oil replenishing valve to the bottom of the pump chamber and is about 1 cm higher than the upper surface of the bottom. When the oil replenishing valve replenishes oil, the oil is replenished from the pump chamber oil pool; the oil level in the pump chamber oil pool is increased to completely immerse the plunger, thereby increasing the lubrication of the plunger during operation and reducing wear.

[0011] The oil circuit structure of the utility model is externally arranged, which is conducive to checking the running state of the oil circuit of the running machine pump.

[0012] The improvement of the oil circuit system of the utility model lies in the adjustment of the position of the safety valve oil unloading pipe, the oil replenishing valve oil replenishing pipe and the oil pool; the original oil storage position is the oil circuit system safety valve, the oil circuit operation line is from the oil circuit safety valve to the oil replenishing valve, when the oil circuit pressure is greater than the oil circuit safety valve starting pressure, the hydraulic oil is unloaded to the safety valve for storage; and the idea of ​​this scheme is to improve the oil storage position to the pump chamber oil pool located on one side of the plunger gland.

[0013] The beneficial effects of the utility model are:

[0014] The oil circuit operation mode brought about by the structure of the oil circuit can solve the problem of reducing the wear of the plunger and packing and extending the spare parts replacement cycle; it increases the lubrication of the plunger during operation; at the same time, the structure adopts an external oil circuit, which is conducive to checking the operating status of the oil circuit of the running machine pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the oil circuit system of the improved reciprocating metering pump of the utility model.

[0016] In the figure, 1, pump body plunger, 2, cylinder body, 3, cylinder head, 4, inlet valve, 5, outlet valve, 6, safety valve, 7, oil supply valve, 8, pump chamber oil pool, 9, oil unloading pipe, 10, oil supply pipe. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0018] like Figure 1The improved reciprocating metering pump oil circuit system shown comprises: a pump body plunger 1, the pump body plunger 1 is inserted into an external cylinder body 2, a cylinder head 3 is provided at the cylinder end of one end of the pump body plunger 1, the cylinder head 3 respectively comprises an inlet valve 4 and an outlet valve 5 of the pump from bottom to top, and a plunger gland is provided at the other end of the pump body plunger 1; a safety valve 6 is provided at the upper end of the cylinder body 2, and an oil replenishing valve 7 is provided at the lower end; a pump chamber oil pool 8 is provided near one side of the plunger gland, an oil unloading pipe 9 is led out from the side end of the safety valve 6 and led to the upper part of the pump chamber oil pool 8, and an oil replenishing pipe 10 is led out from the lower part of the oil replenishing valve 7 and connected to the bottom of the pump chamber oil pool 8;

[0019] The oil unloading pipe 9 is a right-angle elbow, one end of which is fixedly connected to the safety valve 6, and the other end of the pipe head extends into the top of the pump chamber oil pool 8;

[0020] The oil replenishment pipe 10 is a double elbow pipe, one end of which is fixedly connected to the bottom of the oil replenishment valve 7, and the other end of the pipe head extends into the bottom of the pump chamber oil pool 8;

[0021] Furthermore, the distance between the highest point of the oil supply pipe 10 extending into the pump chamber oil pool 8 and the upper plane of the bottom of the pump chamber oil pool 8 is set to 1 cm to prevent impurities from clogging the oil supply pipe 8 during operation;

[0022] The end of the oil unloading pipe 9 extending to the pump chamber oil pool 8 corresponds to the point where the pump chamber oil pool 8 is located and is located on the same vertical line as the end of the oil replenishing pipe extending to the pump chamber oil pool 8.

[0023] In the oil circuit system with the above structure, the oil discharge pipe 9 of the safety valve 6 is led to the upper part of the pump chamber oil pool 8. When the safety valve 6 is tripped, the oil level is higher than the outlet of the oil discharge pipe 9, and the hydraulic oil is discharged from the oil discharge pipe 9 to the pump chamber oil pool 8; the oil replenishing pipe 10 is led from the oil replenishing valve 7 to the bottom of the pump chamber oil pool 8 and is about 1 cm higher than the upper surface of the bottom. When the oil replenishing valve 10 replenishes oil, the oil is replenished from the pump chamber oil pool 8; the oil level in the pump chamber oil pool 8 is increased to completely immerse the pump body plunger 1, thereby increasing the lubrication of the plunger 1 during operation and reducing wear.

[0024] The improvement of the oil circuit system of the present invention lies in the adjustment of the position of the oil unloading pipe 9 of the safety valve 6, the position of the oil replenishing pipe 10 of the oil replenishing valve 7 and the position of the oil pool 8; the original oil storage position is the oil circuit system safety valve, and the oil circuit operation line is from the oil circuit safety valve to the oil replenishing valve. When the oil circuit pressure is greater than the oil circuit safety valve starting pressure, the hydraulic oil is unloaded to the safety valve for storage; and the idea of ​​this scheme is to improve the oil storage position to the pump chamber oil pool 8 located on one side of the plunger gland.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. An improved reciprocating metering pump oil circuit system, characterized in that: include: A pump body plunger, wherein the pump body plunger is inserted into an external cylinder body, a cylinder cover is provided at the cylinder end portion located at one end of the pump body plunger, and the cylinder cover includes an inlet valve and an outlet valve of the pump from bottom to top, respectively, and a plunger gland is provided at the other end of the pump body plunger; a safety valve is provided at the upper end of the cylinder body, and an oil replenishing valve is provided at the lower end; a pump chamber oil pool is provided near one side of the plunger gland, an oil unloading pipe is led out from the side end of the safety valve and led to the upper part of the pump chamber oil pool, and an oil replenishing pipe is led out from the lower part of the oil replenishing valve and connected to the bottom of the pump chamber oil pool.

2. An improved reciprocating metering pump oil circuit system according to claim 1, characterized in that: The oil unloading pipe is a right-angle elbow pipe, one end of which is fixedly connected to the safety valve, and the other end of the pipe head extends into the top of the oil pool of the pump chamber.

3. An improved reciprocating metering pump oil circuit system according to claim 1, characterized in that: The oil replenishing pipe is a double elbow pipe, one end of which is fixedly connected to the bottom of the oil replenishing valve, and the other end of the pipe head extends into the bottom of the oil pool of the pump cavity.

4. An improved reciprocating metering pump oil circuit system according to claim 3, characterized in that: The distance between the highest point where the oil replenishing pipe extends into the oil pool of the pump chamber and the upper plane of the bottom of the oil pool of the pump chamber is set to 1 cm.

5. An improved reciprocating metering pump oil circuit system according to claim 4, characterized in that: The end of the oil unloading pipe extending to the pump chamber oil pool corresponds to the end of the oil replenishing pipe extending to the pump chamber oil pool at the pump chamber oil pool and is located on the same vertical line.

6. An improved reciprocating metering pump oil circuit system according to claim 1, characterized in that: The oil circuit structure adopts external form.

Images