CN106969192B - Jacket heat preservation sampling valve - Google Patents

Abstract

The invention discloses a jacket heat-preservation sampling valve which comprises a valve body, an outer pipe jacket assembly, a sealing assembly, a connecting rod and a hand wheel, wherein the valve body is sleeved in a cavity of the outer pipe jacket assembly, the valve body is fixedly connected with the outer pipe jacket assembly, the sealing assembly is installed in the valve body, and the sealing assembly is fixedly connected with the hand wheel through the connecting rod; the sealing assembly comprises a plunger, a valve rod, a sealing base and a sealing auxiliary part, the sealing base is also vertically provided with a fixed shaft sleeve, and the sealing auxiliary part is arranged in the fixed shaft sleeve; a valve rod movable cavity is arranged inside the plunger, and the valve rod is connected with the valve rod movable cavity through threads; a fixing frame device is also arranged between the sealing component and the connecting rod; during operation, the plunger can move up and down by rotating the hand wheel. The invention improves the defects of easy leakage and large occupied space in installation of the sampling valve in the prior art, and the improved device has the characteristics of good sealing property, small occupied space and long service life.

Description

A Jacketed Thermal Sampling Valve

technical field

The invention relates to a valve device, in particular to a jacket heat preservation sampling valve.

Background technique

Sampling valve is a valve used to obtain medium samples in pipelines or equipment. In many occasions where chemical analysis of medium samples is often required, special sampling valves are often used. According to the working principle or performance of sampling, sampling valves can be divided into different types. Considering that many sampling media are inherently harmful and have many restrictions on the environment (some sampling media have temperature requirements, if the temperature requirements are not met, the media will crystallize, solidify, etc.), and the installation environment of the sampling valve may Causes certain corrosion hazards to its parts. In order to meet the needs of the market, the invention discloses a sampling valve with a heat preservation jacket with a vacuum cover. The traditional jacketed sampling valve usually has the following technical problems: 1) The single-layer packing seal of the traditional jacketed sampling valve, once the packing is damaged during the assembly process, or the packing is not pressed tightly, it will cause leakage and dangerous accidents. 2) The traditional jacketed sampling valve needs to leave an open space, and there are restrictions on the installation position. 3) The traditional jacketed sampling valve has no vacuum protection structure, and some parts are directly in contact with the external environment, which is easily corroded and reduces the service life. Aiming at the above technical problems, the invention discloses a jacketed heat preservation sampling valve, which greatly improves the sealing performance and prolongs the service life.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a jacketed heat preservation sampling valve to solve the problems of poor sealing, easy damage, large installation space and short service life of the sampling valve in the prior art. Problem, the invention discloses a jacket heat preservation sampling valve;

The present invention is achieved through the following technical solutions: the present invention discloses a jacket heat preservation sampling valve, which includes a valve body, an outer sleeve assembly, a sealing assembly, a connecting rod and a hand wheel, and the valve body is set in the cavity of the outer sleeve assembly Inside, the valve body is fixedly connected with the outer sleeve assembly. The outer sleeve assembly is also provided with a medium inlet and a medium outlet. The valve body includes a fluid pipeline, a sealing pipeline and a sampling pipeline. The fluid pipeline and the sealing pipeline are vertically arranged and the ends of the sealing pipeline are arranged. part of the fluid pipe is connected with the side wall of the fluid pipe, the sampling port of the sampling pipe is connected with the side wall of the vertically arranged sealing pipe, the sealing assembly is installed in the inner cavity of the sealing pipe, and the sealing assembly is connected with the manual valve arranged outside the valve body through the connecting rod. The wheel is fixedly connected; the sealing assembly includes a plunger, a valve stem, a sealing base and a sealing accessory. The sealing base is provided with a shaft sleeve installation hole, and the sealing base is also vertically provided with a fixed shaft sleeve. The bottom of the fixed shaft sleeve is set on the shaft sleeve. In the installation hole and fixedly connected with the sealing base, the sealing auxiliary part is set in the fixed shaft sleeve. The sealing auxiliary part includes the upper packing, the installation shaft sleeve, the lower packing and the packing pressure sleeve from top to bottom, and the upper packing is fixed on the fixed shaft sleeve. The packing compression sleeve is located at the bottom of the fixed shaft sleeve. The sealing assembly also includes a compression sleeve compression ring, which is located at the lower part of the packing compression sleeve. The side of the compression sleeve compression ring is fixedly connected with the sealing base through nuts. , the plunger is set vertically and runs through the compression sleeve compression ring and the fixed bushing, the inside of the plunger is provided with a valve stem movable chamber, the valve stem is vertically arranged at the bottom of the plunger, and the top of the valve stem is installed in the valve stem movable chamber Inside, the valve stem and the valve stem movable cavity are connected by threads, and the bottom of the sealing pipe and the outer sleeve assembly are respectively fixedly connected to the upper surface of the sealing base; there is also a fixing frame device between the sealing assembly and the connecting rod, and the fixing frame device includes Column, connecting column and connecting column mounting seat, the connecting column mounting seat is fixedly connected with the bottom end of the column, the top of the column is fixedly connected with the sealing base, the connecting column mounting seat is provided with a connecting column movable cavity, and the connecting column is provided with a fixing ring , the connecting column runs through the connecting column mounting seat, and the fixing ring is fixedly arranged in the movable cavity of the connecting column; the top end of the connecting column is fixedly connected with the bottom end of the valve stem, and the bottom end of the connecting column is fixedly connected with the top end of the connecting rod; when working, The plunger can be moved up and down by rotating the hand wheel. This device has the function of heat preservation and cold preservation. By passing cold and hot media into the outer casing assembly, it can effectively prevent the crystallization and solidification of the medium, and improve the practicability of the valve; at the same time, the sealing performance is greatly improved, which can effectively prevent sampling The leakage problem that occurs during the process improves the safety of the valve during sampling. At the same time, the connecting rod and the handwheel do not need to move up and down during the opening and closing process of the device, that is, there is no need to leave an opening space, which reduces the limitation on the installation position of the valve.

Further, a vacuum cover is fixedly installed on the lower part of the sealing base, the vacuum cover is located between the sealing base and the hand wheel, and a vacuum sealing valve is also provided on the side wall of the vacuum cover; the vacuum cover effectively isolates its internal device from the The outside air protects the internal devices and prolongs the service life.

Further, in order to better realize the connection between the valve stem and the plunger, a guide device is fixed at the bottom of the plunger, and the guide device is located between the plunger and the valve stem.

Further, in order to achieve better sealing, a bottom packing is also provided between the vacuum cover and the connecting rod.

Further, in order to better realize the sampling process, the axis of the sampling pipeline has an inclination angle of 30-60° horizontally downward.

The invention discloses a jacket heat preservation sampling valve, which has the following advantages compared with the prior art: 1) It has the function of heat preservation and cold preservation. It can effectively prevent the crystallization and solidification of the medium, and improve the practicability of the valve. 2) Strong sealing performance. It can effectively prevent the leakage problem in the sampling process and improve the safety of the valve during sampling. 3) Easy to open. During the opening and closing process of the device, the valve stem and the hand wheel do not need to move up and down, that is, there is no need to leave an opening space, which reduces the limitation of the valve installation position. 4) Extended service life. The vacuum cover effectively isolates the internal device from the outside air, which protects the internal device and prolongs the service life.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is this utility sectional view;

Fig. 3 is a perspective view of the sealing base;

Fig. 4 is a structural schematic diagram of the sealing accessory;

Fig. 5 is a schematic diagram of the connection between the sealing pair and the plunger;

Figure 6 is a schematic diagram of the connection between the sealing base and the plunger;

Fig. 7 is a structural schematic diagram of a fixed frame;

Figure 8 is a schematic diagram of the connecting column structure;

Figure 9 is a schematic diagram of the internal structure of the connecting seat;

Figure 10 is a schematic diagram of the plunger opening structure;

Fig. 11 is a schematic diagram of the plunger closing structure.

Detailed ways

The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

Example 1

Embodiment 1 discloses a jacketed heat preservation sampling valve, as shown in Figure 1-2, including a valve body, an outer sleeve assembly 1, a sealing assembly, a connecting rod 16 and a hand wheel 18, the valve body is set in the outer sleeve assembly In the cavity, the valve body includes a fluid pipeline 2, a sealing pipeline 3 and a sampling pipeline 4. The valve body is fixedly connected with the outer sleeve assembly 1. The outer sleeve assembly 1 is also provided with a medium inlet 11 and a medium outlet 12. The fluid pipeline 2 It is vertically arranged with the sealing pipe 3 and the end of the sealing pipe 3 is connected with the side wall of the fluid pipe 2, the sampling port of the sampling pipe 4 is connected with the side wall of the vertically arranged sealing pipe 3, and the sealing assembly is installed on the side wall of the sealing pipe 3. Inner cavity, the sealing assembly is fixedly connected with the hand wheel 18 arranged outside the valve body through the connecting rod 16; the sealing assembly includes a plunger 6, a valve stem 11, a sealing base 7 and a sealing accessory 5, as shown in Figure 3, the sealing base 7 is provided with a shaft sleeve installation hole (not marked in the figure), and a fixed shaft sleeve 71 is vertically arranged on the sealing base 7, and the bottom of the fixed shaft sleeve 71 is set in the shaft sleeve installation hole and is fixedly connected with the sealing base 7. As shown in Figure 4-6, the sealing accessory 5 is set in the fixed shaft sleeve 71, and the sealing accessory 5 includes an upper packing 51, an installation sleeve 52, a lower packing 53 and a packing gland 54 from top to bottom, and the upper packing 51 is fixed on the top of the fixed bushing 71, and the packing gland 54 is located at the bottom of the fixed bushing 71. The sealing assembly also includes a compression ring 8, which is located at the lower part of the packing gland 54. The side part of the pressure ring 8 is fixedly connected with the sealing base 7 through a nut, the plunger 6 is vertically arranged and penetrates the pressure sleeve compression ring 8 and the fixed shaft sleeve 71, the inside of the plunger 6 is provided with a valve stem movable chamber 61, and the valve stem 11 is vertically arranged at the bottom of the plunger 61, the top of the valve stem 11 is installed in the valve stem movable chamber 61, the valve stem 11 and the valve stem movable chamber 61 are connected by threads, and the bottom of the sealing pipe 3 and the outer sleeve assembly 1 They are respectively fixedly connected to the upper surface of the sealing base 7; there is also a fixing frame device between the sealing assembly and the connecting rod 16, as shown in Figure 7-9, the fixing frame device includes a column 10, a connecting column 13 and a connecting column mounting seat 12 , the connecting column mount 12 is fixedly connected to the bottom of the column 10, the top of the column 10 is fixedly connected to the sealing base 7, the connecting column mounting seat 12 is provided with a connecting column movable chamber 121, and the connecting column 13 is provided with a fixing ring 131, The connecting column 13 runs through the connecting column mounting seat 12, and the fixed ring 131 is fixedly arranged in the movable cavity 121 of the connecting column; The top is fixedly connected; during work, the plunger 6 can move up and down by rotating the hand wheel 18. This device has the function of heat preservation and cold preservation. It can control the temperature of the material by passing cold and hot medium into the medium inlet 11 of the outer casing assembly 1 to prevent crystallization and solidification. The medium flows out from the medium outlet 12; the sealing base 7 The lower part of the vacuum cover 15 is also fixedly installed, the vacuum cover 15 is located between the sealing base 7 and the hand wheel 18, and the side wall of the vacuum cover 15 is also provided with a vacuum sealing valve 14; the vacuum cover 15 effectively isolates its internal device from the The outside air protects the internal devices and prolongs the service life. The bottom of plunger 6 is also fixed with guiding device 9, and guiding device 9 is positioned between plunger 6 and valve stem 11, can make valve stem move vertically by guiding device; In order to realize sealing better, vacuum cover 15 and connecting rod There is also an underfill 17 between 16 . The axis of the sampling pipe 4 in this embodiment has an inclination angle of 30° horizontally downward. When sampling, the required heat preservation medium should be injected into the sleeve part 1 outside the valve to ensure that the valve can only be opened after the crystals in the valve are melted. The process of sampling and closing the sample is shown in Figure 10-11. Open the hand wheel 18, and the plunger 6 will open downward through the threaded cooperation with the valve stem 11. The depth of the threaded hole of the plunger 6 will limit the opening height. After opening the valve, the required The sampling medium then flows out from the lateral flow channel and the sample is taken. After sampling, the valve is closed by the same principle.

Example 2

Embodiment 2 discloses a jacketed heat preservation sampling valve, including a valve body, an outer sleeve assembly 1, a sealing assembly, a connecting rod 16 and a hand wheel 18, the valve body is set in the cavity of the outer sleeve assembly, and the valve body includes a fluid The pipeline 2, the sealing pipeline 3 and the sampling pipeline 4, the valve body is fixedly connected with the outer sleeve assembly 1, and the outer sleeve assembly 1 is also provided with a medium inlet 11 and a medium outlet 12, and the fluid pipeline 2 and the sealing pipeline 3 are vertically arranged and sealed The end of the pipeline 3 is connected with the side wall of the fluid pipeline 2, the sampling port of the sampling pipeline 4 is connected with the side wall of the vertically arranged sealed pipeline 3, and the sealing assembly is installed in the inner cavity of the sealed pipeline 3, and the sealing assembly passes through the connecting rod 16 is fixedly connected with the hand wheel 18 arranged on the outside of the valve body; the sealing assembly includes a plunger 6, a valve stem 11, a sealing base 7 and a sealing accessory 5, the sealing base 7 is provided with a shaft sleeve installation hole, and the sealing base 7 is also provided with A fixed shaft sleeve 71 is arranged vertically. The bottom of the fixed shaft sleeve 71 is set in the shaft sleeve installation hole and is fixedly connected with the sealing base 7. The sealing auxiliary part 5 is set in the fixed shaft sleeve 71. The sealing auxiliary part 5 is from top to bottom It includes an upper packing 51, an installation sleeve 52, a lower packing 53 and a packing gland 54 in sequence. The upper packing 51 is fixed on the top of the fixed shaft sleeve 71, and the packing gland 54 is located at the bottom of the fixed shaft sleeve 71. The sealing assembly also includes a gland Compression ring 8, the compression sleeve compression ring 8 is located at the lower part of the packing compression sleeve 54, the side of the compression sleeve compression ring 8 is fixedly connected with the sealing base 7 through a nut, and the plunger 6 is vertically arranged and penetrates the compression sleeve compression ring 8 and the fixed bushing 71, the inside of the plunger 6 is provided with a valve stem movable cavity 61, the valve stem 11 is vertically arranged at the bottom of the plunger 61, the top of the valve stem 11 is installed in the valve stem movable cavity 61, the valve stem 11 It is connected with the valve stem movable chamber 61 through threads, and the bottom of the sealing pipe 3 and the outer sleeve assembly 1 are fixedly connected with the upper surface of the sealing base 7 respectively; a fixing frame device is also provided between the sealing assembly and the connecting rod 16, and the fixing frame The device includes a column 10, a connecting column 13 and a connecting column mounting seat 12, the connecting column mounting seat 12 is fixedly connected to the bottom end of the column 10, the top of the column 10 is fixedly connected to the sealing base 7, and the connecting column mounting seat 12 is provided with a connecting column The movable cavity 121, the connecting column 13 is provided with a fixed ring 131, the connecting column 13 runs through the connecting column mounting seat 12, and the fixed ring 131 is fixedly arranged in the connecting column movable cavity 121; the top of the connecting column 13 and the bottom end of the valve stem 11 Fixedly connected, the bottom end of the connecting column 13 is fixedly connected with the top end of the connecting rod 16; during operation, the plunger 6 can be moved up and down by rotating the hand wheel 18. This device has the function of heat preservation and cold preservation. It can control the temperature of the material by passing cold and hot medium into the medium inlet 11 of the outer casing assembly 1 to prevent crystallization and solidification. The medium flows out from the medium outlet 12; the sealing base 7 The lower part of the vacuum cover 15 is also fixedly installed, the vacuum cover 15 is located between the sealing base 7 and the hand wheel 18, and the side wall of the vacuum cover 15 is also provided with a vacuum sealing valve 14; the vacuum cover 15 effectively isolates its internal device from the The outside air protects the internal devices and prolongs the service life. The bottom of plunger 6 is also fixed with guiding device 9, and guiding device 9 is positioned between plunger 6 and valve stem 11, can make valve stem move vertically by guiding device; In order to realize sealing better, vacuum cover 15 and connecting rod There is also an underfill 17 between 16 . The axis of the sampling pipeline 4 in this embodiment has an inclination angle of 60° horizontally downward.

Claims (5)

1. A jacket heat preservation sampling valve, comprising a valve body, an outer sleeve assembly, a sealing assembly, a connecting rod and a hand wheel, the valve body is set in the cavity of the outer sleeve assembly, the valve body and The outer sleeve assembly is fixedly connected, the outer sleeve assembly is also provided with a medium inlet and a medium outlet, the valve body includes a fluid pipeline, a sealing pipeline and a sampling pipeline, and the fluid pipeline is vertically arranged to the sealing pipeline And the end of the sealed pipe is connected with the side wall of the fluid pipe, the sampling port of the sampling pipe is connected with the side wall of the sealed pipe vertically arranged, and the sealing assembly is installed on the sealed pipe. The inner cavity of the sealing assembly is fixedly connected with the hand wheel arranged outside the valve body through the connecting rod; it is characterized in that the sealing assembly includes a plunger, a valve stem, a sealing base and a sealing pair, and the The sealing base is provided with a shaft sleeve installation hole, and the sealing base is also vertically provided with a fixed shaft sleeve. The bottom of the fixed shaft sleeve is sleeved in the shaft sleeve installation hole and is fixedly connected with the sealing base. The sealing pair is set in the fixed shaft sleeve, and the sealing pair includes upper packing, installation shaft sleeve, lower packing and packing pressure sleeve from top to bottom, and the upper packing is fixed on the fixed shaft sleeve. top, the packing gland is located at the bottom of the fixed shaft sleeve, and the sealing assembly also includes a gland compression ring, the gland compression ring is located at the lower part of the gland, and the gland compresses The side part of the ring is fixedly connected with the sealing base through a nut, the plunger is vertically arranged and penetrates through the compression ring and the fixed bushing, and a valve stem movable chamber is arranged inside the plunger. The valve stem is vertically arranged at the bottom of the plunger, the top end of the valve stem is installed in the valve stem movable chamber, the valve stem and the valve stem movable chamber are connected by threads, and the sealing The bottom of the pipe and the outer sleeve assembly are respectively fixedly connected to the upper surface of the sealing base; a fixing frame device is also provided between the sealing assembly and the connecting rod, and the fixing frame device includes a column, a connecting column and The connecting column mounting seat is fixedly connected to the bottom end of the column, the top of the column is fixedly connected to the sealing base, and the connecting column mounting seat is provided with a connecting column movable cavity. A fixing ring is provided on the connecting column, and the connecting column passes through the connecting column mounting seat, and the fixing ring is fixedly arranged in the movable cavity of the connecting column; the top end of the connecting column is connected with the bottom end of the valve stem Fixed connection, the bottom end of the connecting column is fixedly connected with the top end of the connecting rod; when working, the plunger can move up and down by rotating the hand wheel. 2. jacket insulation sampling valve as claimed in claim 1, is characterized in that, the bottom of described sealing base is also fixedly installed with vacuum cover, and described vacuum cover is positioned between described sealing base and described hand wheel, and A vacuum sealing valve is also provided on the side wall of the vacuum cover. 3 . The jacketed heat preservation sampling valve according to claim 1 , wherein a guiding device is fixed on the bottom of the plunger, and the guiding device is located between the plunger and the valve stem. 4 . 4. The jacketed heat preservation sampling valve according to claim 2, characterized in that, a bottom packing is also provided between the vacuum cover and the connecting rod. 5. The jacketed heat preservation sampling valve according to claim 1, characterized in that, the axis of the sampling pipeline has an inclination angle of 30-60° horizontally downward.

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